The new 'Move and copy' operation from #6040 requires UPDATE permissions
on the selected files. However, READ would be sufficient to create a
copy of a file (if not viewed as a public share). For this reason this patch:
- changes the permission of the 'MoveCopy' action to PERMISSION_READ
- changes the label of the action depending on the permissions
- changes the available buttons in the Move/Copy dialog depending on the
permissions.
The same changes are done to the filelist view for bulk actions.
Signed-off-by: Roland Tapken <roland@bitarbeiter.net>