Explicitly label closed source apps as such

[ghost]

Add "Closed Source" labels to every closed source app tile in all the app sections. This could inform the users better about the apps they use. The label should have full "Closed Source" text in them for extra clarity and awareness

[matchboxbananasynergy]

As far as I know, the plan is to instead put an "open-source" label on the open-source apps, and people will be able to filter for that tag so that they're only shown open-source apps if they prefer that.

[ghost]

Thanks, also a good idea

[lberrymage]

Prerequisite: #4

Also yes, it seems preferable to do the inverse of this.

[lberrymage]

Moving to meta since this also requires devconsole work.

[lberrymage]

Closing in favor of #25