Interface visibility/intuition improvements

[ES-Alexander]

• toggles should change colours when toggled
  • development config does this already
    
  • alert config is visually very difficult to make sense of without this:
    
  • armed/disarmed slider would benefit from this too (likely with red when armed, possibly a darkish green when disarmed)
    
• selectable things/options should have visual icons
  • Joystick button functions by protocol type, as recommended in Joystick: suggested interface improvements #617
    
  • Joystick button and function mappings import+export buttons should have icons
    • I’m thinking standard download and upload for the to/from computer buttons, and then maybe sideways arrows for the to/from vehicle buttons?
  • Views could either have an icon section added, or just use an emoji in the name (e.g. 🎥 / 🗺️ / ⏂)
    
  • Mini-widget indicators should have their icons and names displayed in the list - the current behaviour is unintuitive:
    
    • Use the variable name as the widget name on the VeryGenericIndicator #597 is relevant