Implement new production hotkeys. Fixes #3915, #4142, #4181.
Remove obsolete key definitions.
Add queue hotkeys to RA, and make TD consistent with C&C3. Fixes #6031.
Redefine orderbutton and menu hotkeys.
Change unit selection hotkeys to match C&C3.
Change status bar hotkeys to match C&C3.
Remaining hotkey changes.
Disable multiple-queuing from the keyboard.
Change legacy menu button labels.
Merge pull request #6129 from pchote/production-hotkeys

Closes #3915
Closes #4142
Closes #4181
Closes #6031