[dev] [en] fixing localization

[Thomas Preud'homme]

Hi there, [yeah I need to change from time to time]

I noticed while packaging SàT that the localization was not working despite 
the translated strings being installed in the correct system path. Then I 
stumbled upon this line in frontends/src/quick_frontend/quick_app.py:

gettext.install('sat_frontend', "../i18n", unicode=True)

and the corresponding line in frontends/src/jp/jp:

gettext.install('jp', "i18n", unicode=True)


The intent of these lines is to find the translated strings in the source tree 
but then it doesn't work when installed properly. Of course an if statement 
could be added to use the correct gettext.install but there is probably 
cleaner solution to be done. Meanwhile, I follow the simple approach of using 
the default system path in the Debian packaging as the package is supposed to 
be installed, not just decompressed. The patch used can be found in the file 
attached to this email.

Best regards,

Thomas Preud'homme
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