Sync the LEDs at the end of the loop

Instead of syncing right after updating, sync at the end of the loop. This
allows hooks (both loop and event handler hooks) to override LED colors, without
cooperation from the active LED effect, and without flickering.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

src/KeyboardioFirmware.cpp

@@ -39,6 +39,8 @@ Keyboardio_::loop(void) {
       custom_loop_t hook = loopHooks[i];
       (*hook)(true);
     }
+
+    led_sync ();
 }
 
 void

src/LEDControl.cpp

@@ -51,8 +51,6 @@ LEDControl_::update (void) {
   if (modes[mode])
     (modes[mode]->update) ();
 
-  led_sync ();
-
   previousMode = mode;
 }