switch to xcompmgr

.config/i3/config

@@ -54,7 +54,7 @@ exec --no-startup-id wal -i ~/.config/wall.png >/dev/null
 # Starts dunst for notifications:
 exec --no-startup-id dunst
 # Composite manager:
-exec --no-startup-id compton
+exec --no-startup-id xcompmgr
 # Runs the key remapping scripts
 exec --no-startup-id remaps
 # Unclutter makes the mouse invisible after a brief period