workflow 7.x-2.8

A new bug-fix release, soon after 2.6/2.7, because of a core error that occurs when upgrading to 2.6/2.7 with drush:

Changes since 7.x-2.6
Issue #2620530: Include WorkflowInterface.php to avoid fatal errors when upgrading using drush
Issue #2620530: Re-add file WorkflowTransitionController.php to avoid fatal errors when upgrading using drush
Issue #2611794 by Zekvyrin: Support action buttons for other entities
Issue #2612702 by Zekvyrin: workflow_node_current_state is not correct in some use cases
Issue #2605718: Fixed no workflow_history tab for examples\entity_example.module entities
Issue #2613204: Fixed WSOD when adding/editing a non-node entity with workflow_field
Issue #2613194: Show field_name in Workflow history tab
Issue #2612648: Implement WorkflowInterface
Issue #2611514: Fixed Re-assigning WorkflowField when disabling state
Issue #2612598: Warning: Missing argument n for workflow_notify_workflow()

Changes since 7.x-2.5
Issue #2340011: Fixed Error "Workflow 0 cannot be loaded" when using Workflow Node and Workflow Rules
Issue #2401481: Fixed error when creating a Transition, parameter values() is discarded
Issue #2401493: Added $transition->getTimestamp()
Issue #2401511: Renamed hook-functions in workflownode module
Issue #2406175: Implemented a WorkflowTransitionForm form object
Issue #1559680: Make Transitions fieldable entities -1-
Issue #2406175: Uniformed creation of form_id
Issue #2406175: Moved WorkfowTransitionEdit to th WorkflowTransitionForm form object
Issue #2441821: Fixed wrong link
Issue #2441821: Fixed error
Issue #2441821: Better determination of field_name
Issue #2421157: Added Block for viewing/changing a Workflow State
Issue #2417193 by kaare: Added stub for undefined method WorkflowItem::delete()
Issue #2430243: Fixed fragile check for entity edit mode in WorkflowTransitionForm::submitForm()
Issue #2467103: State is lost when comment with Workflow Widget is submitted, and node has end-state
Issue #2546152 by NancyDru: Added submodule workflow_notify.
Issue #2532128 by wayaslij: EntityMetadataWrapper $property call should first check if method exists
Issue #2413593 by kyoder: Fixed EntityMetadataWrapperException in workflow.tokens.inc
Issue #2169859 by kyoder, BAHbKA: Problems with Workflow Access Features
Issue #2373103 by chilic: Notice in Node Preview mode in list_field_formatter_view()
Issue #2472501 by alan-io1: Use features_get_default in hook_features_rebuild
Issue #2484325 by GuyPaddock: Error on Site installation: table Workflows doesn't exist
Issue #2376557 by deetergp: Token 'comment' does not work
Issue #2351299 by johnv: Prepare D8-Port: split class files
Issue #2484297 by vasi, bartvig, GuyPaddock: Features import / revert broken in 2.5+
Issue #2375261: Undo adding workflow to workflow_field features-export
Issue #2569801 by joshf: Index {workflow_node_history}.nid
Issue #2351299: Undo Prepare D8-Port: split class files
Issue #2562475: Fixed Fatal PHP Error: Unsupported operand types in workflow....
Issue #2506507: Workflow Node scheduled transition : PHP Fatal error when upd...
Issue #2577687 by Kgaut: Fixed unclear enabling messages
Issue #2372171: Database upgrade fails with Call to undefined function workfl...
Issue #2587485: Fixed broken link in workflow.features.inc
Issue #2571627: D8-port: D7-code improvements
Issue #2600346: Enable roles for 'participate' by default on new Workflow
Issue #2484431 by GuyPaddock: Do NOT automatically enable roles to participat...
Issue #2502547 by djdevin, johnv: Add Entity Id to WorkflowScheduledTransition
Issue #2600426: Fixed: Time of Scheduled Transition is not retrieved in Workf...
Issue #2385439 by johnv: Fixed typo in code
Issue #2514782 by johnv: Added Workflow field help text to Workflow widget
Issue #2600808: Wrap workflow form in Fieldset
Issue #2307303: Added dependency on entity module v7.x-1.6
Issue #2555563 by NancyDru: Organic Groups strict access overrides Workflow A...
Issue #2446811: Remove multiple workflows in workflow_access_node_access_reco...
Issue #2600934 by najamfzl, johnv: Fixed PDOException: SQLSTATE[23000]: Integ...
split form functions in own include file
Issue #2601136: move scheduling info in own container (in WorkflowTransitionf...
Issue #1559680: Make Transitions fieldable entities - add extra fields + fiel...
Issue #2601240: Fixed Notice: Undefined index: id in WorkflowTransitionForm->...
Issue #2601304: Fixed Error in Editing an existing WorkflowTransition
Issue #2597307 by caminadaf, johnv: Fixed Workflow retrieving wrong SID on AJ...
Issue #1511694 by joel_osc, bibishani, natew, dshields: Better integration of...
Issue #2601304: Fixed Error in Editing an existing WorkflowTransition
Issue #2581909: Change status via VBO
Issue #2557905 by natanmoraes: PDOException when firing rule "Set a Workflow ...
Issue #2601304: Error in Editing an existing WorkflowTransition
Issue #2375261: Redo adding workflow to workflow_field features-export
Issue #2578493: html_encode option values for workflow/state/transition
Issue #2510958: Added css-classes to Workflow Transition Form
Issue #2363521: Remove unnecessary action button in Node View page
Issue #2599610 by plopesc: Schedule state change radio buttons generate confl...
Issue #2545660: Make action buttons more unique
Issue #2584883: [D8-port task] test all hooks
Issue #2595247: Actions buttons: make code more local
Issue #2600934: PDOException: SQLSTATE[23000]: Integrity constraint violation...
Issue #2351299: Prepare D8-port: move forms in own file.
Issue #2604914: Fatal error: Call to a member function getName() on a non-object
Issue #2595247: Actions buttons: make code more local
Issue #2604968: States help blocked by case switching in workflow_admin_ui_help
Issue #2604246 by skek: Performance optimisation in Workflow::save()
Issue #2605256 by bleedev: Unknown data property field_workflow error when de...
Issue #2285983: Workflows Admin UI Broken on SQLite
Issue #2581909: Change status via VBO
Issue #2605822: Wrong default option when adding an entity with workflow
Issue #2604048: Amend WorkflowTransition::dpm()
Issue #2604246 by skek, danielmrichards: Performance optimisation for Workflo...
Issue #2607150 by aronne: Workflow transitions don't respect configured permi...
Issue #2607198 by heykarthikwithu: Add @return type and change @param values ...
Issue #2363521: Fixed removed scheduled action button in Node View page
Issue #2580543: Fixed warnings when displaying tokens
Issue #318325: Add hook_widget_form_alter to workflow.api.php
Issue #2607998: Warning: array_flip() appears when workflow_block is enabled
Issue #2608128 by Murz: Function workflow_execute_transition() ignores timestamp of Workflow transition
Issue #2608452 by mwidner: Fixed failing primary index in table
Issue #2608996: Error when workflow_block on node page without workflow