Dark theme - Improvements

- spinner bg being white

Riot/ViewController/LanguagePickerViewController.m

@@ -70,6 +70,7 @@
 {
     self.defaultBarTintColor = kRiotSecondaryBgColor;
     self.barTitleColor = kRiotPrimaryTextColor;
+    self.activityIndicator.backgroundColor = kRiotOverlayColor;
     
     self.searchBar.barStyle = kRiotDesignSearchBarStyle;
     self.searchBar.tintColor = kRiotDesignSearchBarTintColor;