Suggestion: change the default language while the user select a language

[Cryspia]

There is default language selection in the new configtool framework. Where the user can change the default when start the program. However, user can still change languages in the "Language" menu, and that choice will not be recorded as default.
IMO, it could be better that these two choices can be related.
Besides, is that really necessary to keep both of them?

[zxiiro]

The intent but was never fully implemented is that when you open Freeseer for the first time (no config file exists) it should detect what the locale is on your system and set the language to the user's detected system language.

If the user later decides they want to different language they can select it in the UI and save it. I think the auto-detection should only happen on first run and not later runs where the user might have selected a preferred language.

[dideler]

Related discussion in IRC:

• https://botbot.me/freenode/freeseer/2014-09-30/?msg=22563991&page=1
• https://botbot.me/freenode/freeseer/2014-09-30/?msg=22564441&page=1

[dideler]

Fixed in #609