Update qwc2_viewer.py (#30)

add Encoding, so Umlauts from a .ui file are correctly read.

Author: tobias-brunner

src/qwc2_viewer.py

@@ -837,7 +837,7 @@ def translate_designer_form(self, path, lang):
 
         # Attempt to load translation file
         try:
-            with open(translation_path, 'r') as fh:
+            with open(full_path, 'r', encoding='utf-8') as fh:
                 translation = fh.read()
         except:
             return Response(form, mimetype='text/xml')