Merge pull request #6565 from RosettaCommons/roccomoretti/load_solutions_extend
[Foldit] Allow the LoadSaveDialog to be resized
The solutions list scrollable on the LoadSaveDialog was frustratingly small for me. Being able to extend it when Foldit is fullscreen will make it much easier to browse solutions (particularly the shared-with-scientist solutions).
This PR adds a resize handle to the dialog which allows you to extend the size of the dialog.
It also contains a bugfix for the Resizable widget. Occasionally (particularly when you're moving around the main window size) it looks like it could get stuck thinking that the panel size is below the minimum size, and refusing to resize -- even if the resizing would make the panel bigger. The new code in Resizable should stop that from happening.
RELEASE NOTES: Add the ability to resize the Open/Share Solutions panel.