TISTUD-5665 Make the default dark background for editor a little lighter and closer to Sublime's
- The editor background matches the default dark Atom editor background now. I also modified the overall IDE dark theme to match it where appropriate and bump the full black in the theme from #000000 to #141414 (the editor background went from #141414 to #1d1f21)
Merge pull request #172 from sgtcoolguy/TISTUD-5665

TISTUD-5665