Blink the KeyboardEntryWidget on focus.
Support nested scissor rectangles.
Polish SliderWidget:

- Keep thumb within the EventBounds.
- Fix tick rendering.
Rewrite C&C Settings panel.
Remove legacy settings panel.
Merge pull request #3991 from pchote/new-settings-menu

closes #2243
RA dialog.png file updated (-disabled more grey)

RA dialog.png file updated (-disabled is now more grey)
more subtle highlighted button
Merge pull request #4002 from Mailaender/buttons

Cleaned up RA button colors
Update packaged SDL to 1.2.15.
Change the .config instead of relying on DYLD_LIBRARY_PATH to find SDL. Fixes #3992.
Merge pull request #4004 from pchote/osx-ten-point-fail

Fix OSX 10.9 startup crash.