This fixes a bunch of bugs with setting the title for widgets, deleting
widgets, etc.  It also reduces the amount of code duplication, which is
always a good thing.

Replace 9 seperate valueChanged() signals with just 1, and remove the resultant tons of code duplication

Change for the new RC calibration widget, still needs an if/else to load the old one for unsupported systems

Fixed setting the slider position based on parameter values for variables that don't have a range specified.

Removed commented-out references to setStyleSheet(). Moving towards all styles being set in .css files

Changes for new calibration in APM 3.0 (Re: https://github.com/diydrones/MissionPlanner/issues/38), and change in some of the serial timeouts

Change so Waypoints are the same across maps, and offline waypoints get appeneded to the end of the MAV's waypoint list on connect