Bug fixes

Issue #3026047: Исправить itemprop в малый регистр

Updating the code as per the Drupal Practice code standard

• Added an option to the VisualNFetcher formatter to override fetcher field item stored value
• Implemented DrawerSkin plugin type, added helpers for drawer configuration forms integratation
• Added VisualNDrawing entity type thumbnail field, show thumbnails in visualn_embed drawing select dialog
• Added drawing filters and pager for visualn_embed drawing select dialog
• Added drawing thumbnail field, show drawing thumbnails in visualn_embed drawing select dialog
• Added VisualNDrawing entity type description field, show description on hover in visualn_embed new drawing dialog
• Show drawing entity status checkbox on entity form
• Added revision configuration option to visualn_drawing type configuration page, grouped publishing options into tabs on visualn_drawing edit form
• Minor changes and bugfixes

Restructured code

• Handled API Request Signing feature.
• Standardize the code as per Drupal coding standard reported.

Made progress on Niobi Resource - we have 3 basic resource types for groups, and now need to finish work on departments.

Update installation scriptto resolve an issue with user picture.