Please describe the problem:
When selecting text in gedit, it is stored in PRIMARY clipboard. When unselecting the text, it clears the PRIMARY clipboard.

Most other GNOME applications don't clear PRIMARY when unselecting text, and it seems much more sensible to keep PRIMARY clipboard's content until new content is placed there.

Steps to reproduce:
1. Select some text
2. Left-click anywhere in the editor to unselect the text
3. Middle-click somewhere in the editor


Actual results:
Nothing.

Expected results:
The text that was selected in step 1 should be inserted.

Does this happen every time?


Other information:
To see the behaviour I'd expect from gedit, see most other GNOME applications, e.g. Evolution's mail editor, gnome-terminal and others.