Fixes #13391.  Don't stop mouseup when mousedown didn't start a typematic sequence.  Added automated test.
Fixes #13391.  Don't stop mouseup when mousedown didn't start a typematic sequence.  Added automated test.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@25747 560b804f-0ae3-0310-86f3-f6aa0a117693

harbalk/delite,kitsonk/delite,kitsonk/delite,Sam-Cummins/delite,Sam-Cummins/delite,harbalk/delite