Changed xml to fix overlappings in Spanish locale and make panel closer to spec.

Modified code in indicated changeset to correct problem after consulting with
 Leyla Linden who sugested the orginal change. This fix will convert the Legacy
 name to a user name id not useing Display Names.

STORM-189 FIXED insufficient spacing between controls and truncations in IT, NL, PL and PT locales in Build Tools floater.

STORM-560 FIXED Implemented preference that allows users to select default behavior when pressing letter keys.

- Added check to LLViewerWindow::handleKey() that gives focus to nearby chat if "Pressing letter keys starts local chat" option is selected, key is not special (and no modifier key is held except Shift), camera is not in mouselook and no view currently has keyboard focus.
- The choice of what should happen when letter keys are pressed is saved in new setting added in this fix- "LetterKeysFocusChatBar".

Added opaque water default settings to Linux featuretable.

STORM-576 FIXED Hooked up code to preference that allows users to enable double-click to teleport or use auto-pilot.

- Added dirty flag that is set true when user changes checkbox or chooses one of radiobuttons connected to double-click action. No change of user settings happens on this commit, because user may press cancel or close floater. If user presses OK, and flag is true, user changes are applied to settings.
If user clicks cancel or closes floater, controls are reverted to the state they were before changes, using settings to determine it.

- Removed double-click action menu items and code that handled them to avoid functionality duplication and synchronization problems.

STORM-316 FIXED Added an item to inventory gear menu to control "Sort System Folders to Top" option (was always "true").
Changed inventory gear menu sort items - now they have check marks on the left.
Made inventory sort options persist across sessions.

- Added control_names for the "Show Advanced Menu" and "QAMode" checkboxes