Changing language at run-time doesn't update the Mining Tab language #119

It seems that because the Mining tab is different than all others (added at run-time via C++ instead of XML GUI files) it doesn't get retranslated when the language is changed at run-time

In theory the retranslateUi() function should deal with this correctly, but it might only be working upon UI elements known at compile time, and not those that are added at run-time

One kind of work-around is this: Change language, shut down and restart. The mining tab will be translated. This allows using a different language than the OS default.

OK, I finally came up with a fix to this. Currently on the dev branch the tabText of the Mining tab and the Start/Stop Mining buttons will correctly retranslate when the language is changed at run-time. Still need to work on the rest of the widgets.

With the latest code, things partially work. Somehow the tabText "Mining" and the comboBox of how many threads to use work correctly. You can change the language at run-time many times and they will update. For some weird reason, all the rest of the translations will only update once, if you try to change the language at run-time multiple times, they stop updating. Very weird.

This now seems to work correctly, I think linguist had not been run or something. Closing this for now