QtIFW

Fix loading of translations

In case we hit the English translation just try to load it
and break in any case. In case we hit another language
we only install the translation if the qt translation was
loaded properly, and break.

Change-Id: I2755501c1af8cb51b38cf21e0205bcf05541fb91
Reviewed-by: Niels Weber <niels.weber@theqtcompany.com>