Use dedicated desktop UI translation strings

Please accept hrydgard/native#121 first.

Overall rationale:

1. When specifying hotkeys, many non-English languages will use for example "ゲーム (&G)".  Ignoring ampersands turns this into "ゲーム (G)" which is not useful on Android uis.  It needs a separate string.

2. My OCD compels me to have the all the menu items use consistent capitalization.

3. Some items had notes which were removed.  While I didn't re-instate it, I think "overkill" and "insane" on the texture scaling 4x and 5x options should be reinstated probably.

Additionally, this:
 * Kills the timer.  It was a threading race condition.  Now called after the lang ini is loaded.
 * Fixes a couple minor warnings / debug counter in debugger / etc.
 * Doesn't kill ampersands outside the Windows UI, which is much less confusing imho to translators.

-[Unknown]