to Invoke() in MouseUp() in the code path for keyboard control.
Should fix ticket #6792, but I have not actually tested it.
* Don't post notification values in KeyDown() when the value did
not change because it was constrained between min and max values.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39323 a95241bf-73f2-0310-859d-f6bbb57e9c96