Update options descriptions according to #3869

Restart isn't actually required anymore.
All borders are dark gray (no lite/dark gray mix anymore!)

See snapshots below for details.

Additionally, comparison function was a little bit simplified.
Customize scrollbar
Tiles mode map drawing now uses caching and buffer copying to avoid unnecessary draw calls.

Addresses issue #3433
Fixed a graphical glitch appearing in Deon's tileset.
Add input delay option for SDL.
Merge several rendering related fixes.