fix(core): while trying to increase the backlight brightness at T3W1 using the slider, it lags. The reason is implemented wait for making sure that the display gets refreshed during fade out/fade in transitions. The current implementation of the condition limits the wait only to such cases and not to all when the brightness needs to be increased.

[no changelog]

Author: bleska

core/embed/io/display/ltdc_dsi/display_driver.c

@@ -450,7 +450,7 @@ bool display_set_backlight(uint8_t level) {
   }
 
 #ifdef USE_BACKLIGHT
-  if (level > backlight_get()) {
+  if (level > 0 && backlight_get() == 0) {
     display_ensure_refreshed();
   }