This needs Qt 5.9. Do not merge it yet.

* If new Survey is set to altitude fixed value then use mission default
altitude
* If the user applies a new altitude to the entire mission change
surveys to fixed altitude and apply altitude

This way if the user switches away from manual the altitude is preserved

Remove/comment off debug output pollution

Some crazy shit in UAS.cc was using an array of 256 bytes to handle received messages and mapping them to components. Well, any message ID over 255 would cause a buffer overrun.

Remove debug output
Fact enumStrings and enumValues can not be changed independently. Therefore you only need one signal.

Pulling mavlink with a reversal for the CAMERA_IMAGE_CAPTURED message. It's now back as it was so it won't break existing code.
The pull also brought changes to the GPS_RAW_INT message. Only MockLink uses. I entered zeros for all new fields.

Handle initial storage
Handle image/video capture and storage.

Hide "Save Path" as it breaks the UI in General Settings.