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

Correctly supports application name and branding changes

https://bugreports.qt.io/browse/QTBUG-61424

1. PX4Log parser is split off into its own class
2. New ULog parser implemented

Update the user model to a single controller instead of multiple

Fixed all the bugs the new tests found

* Map type now set from General settings
* No map type control in maps

* Holds all the settings for the app
* Allows core plugin to override default values