CameraManager: bug in CameraPageWudget.gml, stream variable not defined, also avoids a gray spurios window

Except for motorIndexToLetter()

Restructure toolbar to make it Flickable

Use showIndicator property to set correct visibility in loader. This leads to correct spacing on all platforms.

Fix bad merge

Don't show errors from MAV_CMD_SET_MESSAGE_INTERVAL

Don't set wizard mode on regular waypoints

Disable Pause if fixed wing on approach

Remove deprecated Resume Mission action

Fix save state checks. Show overlay on New.

Allow for no default value

Change to combobox

Fix spacing

Reorder toolbar indicators

Fix scoping of visibility changes

Minimum transect spacing of 0.5 meters