* Added a new class to force the pointer cursor.
* Added this class to the Add entry anchors.
* Added a data flag to assist spotting the drag n drop activity when Add
entry is the element clicked for dragging the block.
* Added js to test this data flag before submitting on click.
* Renamed `AddNewPostShortcut()` in recent/tagged posts JS to better
identify them.

Change-Id: I3e367cd9323e9eb5ef18495d33ce6fa9c3c7c48d