Interface visibility/intuition improvements

- toggles should change colours when toggled
- [x] development config does this already

- [x] alert config is visually very difficult to make sense of without this:

- [x] 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
- [x] Joystick button functions by protocol type, as recommended in #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:

- #597 is relevant

Start by reading the existing development-config toggle styling, then inspect the alert config, armed/disarmed slider, joystick mapping import/export controls, Views list, and mini-widget indicator list. Use #597 for the mini-widget context; done means the remaining unchecked controls and selectable items have clear colour or icon cues matching the issue’s examples.

Written by the indexing model from the issue text.