the focus of the knobs is removed, when the fx_mode is changed

knobs.py

@@ -78,9 +78,9 @@ class Knobs:
         for i in range(len(line_points)-1):
             pygame.draw.line(self.gui.screen, color_primary_dark, line_points[i], line_points[i+1], 2)
 
-    def deactivate_knobs_except(self, knob):
+    def set_focused(self, knob):
         for k in self.knobs:
-            if k != knob: k.set_focused(False)
+            k.set_focused(k == knob)
 
     def display(self):
         for knob in self.knobs: