Replaced l() with \Drupal::l()
step and rebuild (in FormStateInterface) aren't form values - don't use value functions.
Some leftovers after the introduction of FormStateInterface
Introduced FormStateInterface in Views plugin too.
Replaced hook_permission implementation with permissions.yml
Removed old D7 cleaning of cache/variable table after uninstall.
Use getValue() to get values from which is an ConfigFormBase object.
Removed the usage of l().
Issue #1631662 by NormySan, hansfn: Add in a back button
Issue #2397879 by olofjohansson: "Select all" checkbox should trigger the change event for effected checkboxes
Issue #2056883 by hansfn: No message ID
Issue #2362741 by hansfn: Custom text field don't work.
Replaced timer_* functions with Timer component - ref https://www.drupal.org/node/1969828
Replaced module_exists with \Drupal::moduleHandler()->moduleExists - ref
Removed a redundant/unneeded line from last commit.
Issue #2339739 by hansfn: Respect $message['send'] when sending mail.
The value can be modified in hook_mail_alter - ref API documentation for drupal_mail.
Updated changelog for 7.x-1.1
Form API fixes for "details" type - ref https://www.drupal.org/node/2204131
Another filter format API fix.
Replaced another drupal_get_query_parameters with UrlHelper::filterQueryParameters.
Removed drupal_set_title - ref https://www.drupal.org/node/2067859
Filter format API fixes.
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