[Bug 34313] scrollbar thumb overshoots when resizing dialogue

[Tristan Wibberley]

Public bug reported:
https://launchpad.net/malone/bugs/34313

Affects: gtk+2.0 (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

Description:
Not sure if this should be an engine bug...

This can be seen in the Login Window Preferences under the Accessibility
tab. After clicking on a sound file selector button, the selector dialog
that appears can be resized vertically (made larger) so that the
scrollbar thumb overshoots below the end of the scrollbar. This is very
easily seen with the new Ubuntu default theme, but also to a lesser
extent with grand canyon (it is very minor with grand canyon).

Clicking on the thumb makes it jump back into position (resetting the
scroll position of the file listing), but leaves the remains of the
scrollbar behind.