Renamed Cut,Copy,Paste,Unlink options (see trac #11880) (rebased onto develop)



This is the same as gh-2133 but rebased onto develop.

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Renamed "Cut", "Copy" and "Paste" options to "Cut Link", "Copy Link" and "Paste Link" and adjusted tooltips accordingly (see trac #11881). Renamed the "Unlink" option for removing tags into "Remove" and adjusted tooltips (see trac #11884).