Corridor edit toolbar

Update for new controls usage

Better handling of invalid coordinates

Survey items start with no polygon

New addObject method

Fix centerViewport calculation

New reusable file dialog for KML/SHP loading

Use QGCCombBox with alternateText for better understanding of the ability to click on these indicators

New features:
* Less padding to the right of drop indicator
* Ability to set font
* alternateText - Set alternate text for button display
* sizeToContents - Width will adjust to fit all contents

Fix textRole usage for QGCComboBox

Update for missing params on rover

Remove duplicates from missing parameter reporting

Treat VHR_HUD.throttle as int16 for reverse throttle

Follow page not showing up for Rover

Save/load main window state

Change jscript usage to make Qml compiler happy

Better handling of unsupported class/frame combinations

Make scrollable, fix broken combobox

Update for 4.0 releases

ArduPIlot Follow Me setup

Add degrees/radians conversion

Fix correct usage of heading value

Sizing fix

MOve to correct Common location

Add setting to show Presets tab first

Add Angle, Rotate, Stats to Presets page

Fix Toolstrip positioning

Rework presets

Use TabBar in Complex Item UI

Stream HOME_POSITION on ArduPilot

More work on mission item indicators

Update tolerance

Fix flight timer

Better flight trajectory point algorithm