Text used to start a new activity should be sanitized before usage

[olafhering]

If a new activity is started via the GNOME3 panel via the "What are you doing?" text entry field the entered text should be sanitized for before usage. This means if someting is copy&pasted with middle mouse button newline chars should be converted to space.

The use case I have is c&p from bugzilla. At the top of each page in https://bugzilla.suse.com there is an easily selectable line in the form of "Bug 123456 Summary". Due to the way its handled by Firefox it gets turned into newline and tabs as seen with 'cat | xxd -a':

0000000: 4275 6720 3935 3733 3734 0a09 0a0a 4c33 Bug 957374....L3

Actually the newlines are initially shown as white squares. Fortunately its possible to adjust the line with special chars later in the "Show overview" window.