Changes in Delete menu in ML

[xeo]

In Local files tab in ML:
- rename "Delete selected" to "Delete selected entry", because it is not clear whether a file or just a library entry will be removed
- rename "Delete all files" to "Delete all entries", because it suggests that the files will be removed physically
- change the behavior for Delete all option, so it deletes entries only from the active group/folder (chosen from the left tree), so it can't delete whole database when only one folder is chosen. Whole database would be deleted only when (show all) is active.

[Artem]

Ok