Dark theme - Improvements

- some hairlines being too bright
- fading behind dialog modals being white rather than dark
- grey highlight bar in room list being too light (i think)?

Riot/Views/RoomInputToolbar/RoomInputToolbarView.m

@@ -82,7 +82,7 @@
     // Remove default toolbar background color
     self.backgroundColor = [UIColor clearColor];
     
-    self.separatorView.backgroundColor = kRiotColorSilver;
+    self.separatorView.backgroundColor = kRiotAuxiliaryColor;
     
     // Custom the growingTextView display
     growingTextView.layer.cornerRadius = 0;