Make the UI work with the new app statuses

[Senyoret1]

Did you run make format && make check?
The go code was not changed. npm run lint and npm run build were used.

Fixes #1214

Changes:

• Now the UI considers an app running if the status is not 0 (stopped) or 2 (failed).
• Now the status 3 is considered “connecting” for all apps.
• Now the UI shows the error message if an app is in status 2.

How to test this PR:
Go to the app list in the Skywire Manager and start an app. While it is connecting, the status will be yellow. This works on big and small screen sizes.

Also, in the same list, try to start an app and make it end with an error (like stating the vpn-client app with an invalid server). The app status should show the error.

NOTE: the original issue listed status 2 as “connecting”, but that code was used as “failed” and status 3 was the one used as “connecting”, as that is what was seen while testing.

[Senyoret1]

The last commit includes a small improvement for how the app list updates the app states after makaing a change.

[mrpalide]

Manually test on mac machine is OK.
mac-test.log