Remove note about reusing the render widget.

This is actually not possible due to how Qt manages child widgets...
"Gamelist view style" -> "List style"

 * Cleaner & more concise.
 * Also add some "Alt" shortcuts
GameGrid: enable uniform item sizes.

Looks much nicer this way.
SystemInfo: various cleanup.

 * Rename the copy slot to match naming convention elsewhere
 * Remove the Mac 10.7/10.8 detection as we don't support it now
Micro-optimize RenderWidgetHasFocus().
Implement the "Rating" column.

Looks like I forgot to do this...
Cast the result of GetSize() to "unsigned long long".

Squelches a warning on Mac OS X.
Support HiDPI flags & rating images.

There aren't any yet, it's up to up to Stevoisiak and MaJoR to create
them :)
Fix HiDPI loading logic.
Merge pull request #1611 from waddlesplash/dolphin-qt

DolphinQt: various cleanup & fixes.