Consider disabling Install / Build+Install when Target: Auto detect and no USB/simulator available

[jsoref]

Context: installing to WiFi.

1. Open Config.
2. Make a change, Save.
3. Switch to Build.
4. Click build+install.
5. Error about no connected device.
6. Select Target: q5.
7. Click build+install.
8. Error (e.g. bad package name).
9. Switch to config.
10. Make a change, Save.
11. Switch to Build.
12. Click build+install.
13. Error about no connected device.

While, it'd be nice if the target persisted, between 7 and 12, I think it'd also be nice if we could proactively note to the user that auto isn't going to work right now.