Add collision avoidance settings to Safety Panel

Remove unused code

Fix missing param

Get rid of QGCView, QGCViewPanel and FactPanel. All messages and dialogs are now handled in the root window.

Grouped logging options within General Settings

Move position of HITL to bottom. Handle no SYS_HITL param.

Warn if SYS_HITL is set

Allow Safety page editing while in flight

Switch threshold highlighting support