No longer buttons so switch to Rectangle for cleaner Qml

Better help text for Firmware Upgrade

Safety config ui design

Handle sensor difference for Fixed Wing

Fix object de-reference crash on deletion

Waiting for real fix to put back. Issue #1275

Firmware Upgrade ui re-work, plus QGCComboBox work

Firmware progress

QGCComboBox initial implementation

Fix missing 5.3->5.4 updates

Fixed issue #1261

Added menu support to QGCButton

Fix for Issue #1255

Also fixed a typo (copy/paste error) in the TCP link settings loading where it was using the UDP port as the default value instead of the TCP port.

Qml Test dialog theme selection support

Cleaning dangling links

Updated palette and QML Controls per ui discussion

Qt 5.4 Upgrade