[Feature] Simplify app

[vividos]

Use Case

As an app user I'd like to use an easy to use app in order to efficiently select base layer and extra layers, and easily add spatial objects to the map.

Describe the solution you'd like
Currently, the app is a bit convoluted to use and overloaded with functions. Also the map with layers, locations and tracks is too inflexible.

Additional context

Rough outline of changes:

• Remove weather feature or move to standalone app
• Remove AlpTherm auto login
• Join settings tab pages
• Remove "Map" as navigation item
• Refactor layers to provide a base layer selection and one or more additional layers
• Refactor locations and tracks to "Spatial Objects"

Spatial Objects can be any of the following:

• Lists of locations, e.g. from .kml, .gpx
• Tracks, including flights from .igc files, live tracks from inReach, route planning, etc.