Made window resizable, main panel and FTB packs pane compatible so far
Scrollbar fixes
Moved pack pane to abstract class, fixed third-party pane
Fixed scrollbars, adjustable vertical pack spacing
Fixed options pane
Fixed buttons for texture pack/map pane
Moved all the split pane stuff into its own class to re-use
Fixed texture pack and map panes to resize
Cleanup, misc
Improve initial sizing
Merge changes
Tweak sizes/borders/etc
Merge pull request #884 from FyberOptic/resizable

Make launcher resizable