Locale for non-QT UI strings

Some parts of strings did not use the proper locale. For example, date
and time strings was always output with the US locale. This fixes it.
There are still some cases where localisation is not implemented, and
could be changed from str(string) to locale.str(string).

src/bitmessageqt/__init__.py

@@ -44,6 +44,7 @@ from about import *
 from help import *
 from iconglossary import *
 from connect import *
+import locale as pythonlocale
 import sys
 from time import strftime, localtime, gmtime
 import time
@@ -99,6 +100,17 @@ def change_translation(locale):
     qsystranslator.load(translationpath)
     QtGui.QApplication.installTranslator(qsystranslator)
 
+    lang = l10n.getTranslationLanguage()
+    if "_" not in lang:
+        lang += "_" + lang.upper()
+    if ".utf8" not in lang.lower():
+        lang += ".utf8"
+    try:
+        pythonlocale.setlocale(pythonlocale.LC_ALL, lang)
+    except:
+        logger.error("Failed to set locale to %s", lang)
+        pass
+
 class MyForm(settingsmixin.SMainWindow):
 
     # sound type constants