Merge pull request #11341 from fabi1cazenave/systemMissingEntities-bug901449

Bug 901449 - [STK] missing l10n entities, r=timdream(cherry picked from commit cfe8c521c2ba67986c0347cbb07c8ad8ec31af2c)
Merge pull request #11467 from fabi1cazenave/uplift-bug901449

Uplift bug901449