Fixed RC calibration trim problem.  Trim was not being set because setTrimPositions() was never being called.

This reverts commit e003dd7a.

Anton and I noticed that the message view stops autoscrolling properly
sometimes when there's a high frequency of arriving messages. This
should fix that problem.

Also fix a few compiler switch warnings

Fixed Compiler Error C2864 - only static const integral data members can be initialized within a class

Add map type selector menu; use Bing maps by default; zoom to a more
human scale on Go Home

Fixed styling of the toolbar, specifically coloring and sizing of the buttons, and made the labels aware of the current window theme. Also made some changes to updating the toolbar when switching UASes or when UASes disconnect/reconnect.

Improved UI when no joysticks are connected. Also removed hotplugging support for joysticks as it wasn't working, though SDL2 should fix that.