[Bug]: Core apps doesn't support translations on init

[ShGKme]

core-main.js is loaded in a very beginning, before /core/l10n/<LANG>.js

As a result, during the first rendering of core apps (AppMenu (MainMenu), ContactsMenu, UserMenu), there is no translation.

It is not noticeable because these apps have almost no translations, except aria-label.

Example, on de_DE the aria-label Contacts is not translated yet.

[susnux]

@szaimen why are you removing the bug label? It is a bug: Something (translations of core) is not working.

[szaimen]

All right. Then lets also add the 29-feedback label. All bugs need such a label...