* Add check permission on delete folder/file
* Provide a way to disable the action when if there is no permission
* Improve the code using the external permission inside the folder/document action service
* Add basic documentation.
- How disable the button when the permission is missing
- How to show a notification message when the permission is missing
* Resize the image
* Change the value to true for demo purpose
* Update folder-actions.service.ts
* Update document-actions.service.ts
* improved uploading of files
- new core/UploadDirective to allow dropping files to any html element
- enhanced file dropping for DataTable rows (disabled by default)
- enhanced file dropping for DocumentList rows (disabled by default)
- upload drop area now handles file uploads for child elements (i.e.
rows in the document list)
* fix unit tests
* unit tests and code cleanup
* #1732, fix upload of folders
* support for column definitions in html
- provides generic support for html-based column definitions for
datatable-like controls
* html column definitions for Task List component
* html column definitions for Document List component
* update code and documentation
* Fix typo `fallbackThubnail` -> `fallbackThumbnail`
* Fix typo `showUdoNotificationBar` -> `showNotificationBar`
Update upload mis-spelled properties to 'showNotificationBar' since
showUndoNotificationBar is already a method on the drag area component
Refs #1559
* Fix test cases
