Dark theme - Improvements

- spinner bg being white

Riot/ViewController/RoomFilesViewController.m

@@ -111,6 +111,7 @@
 {
     self.defaultBarTintColor = kRiotSecondaryBgColor;
     self.barTitleColor = kRiotPrimaryTextColor;
+    self.activityIndicator.backgroundColor = kRiotOverlayColor;
     
     // Check the table view style to select its bg color.
     self.bubblesTableView.backgroundColor = ((self.bubblesTableView.style == UITableViewStylePlain) ? kRiotPrimaryBgColor : kRiotSecondaryBgColor);