Cleanup and renaming

[GlennJoakimB]

• Added comments and document-text to many components, types and functions
• Renamed and moved the component for the map pins
• Removed markerHistory from DataSourceInput as it is not needed
• Now using an array of strings representing marker names, instead of CoordinateEntity[][]
• Implements a function for extracting marker names into a simple list

Renamed:

• display_name to displayName
• toggled to isToggled
• pinDescription to description