Let the user know that the launcher is searching for updates

[costantin0]

Is your feature request related to a problem? Please describe. Every time you open the launcher and go to the settings the text on the bottom of the page will say "Up to date" even if the launcher still has to check for updates.

Describe the solution you'd like Instead of showing "Up to date", show "Checking for updates" with a spinning wheel next to it to let the user know that it's still checking.