Merge develop into main (#338)

### Cardputer:
- Fix keyboard issue with up/down button conflict when selecting switch
- Fix backlight flickering

### UI improvements
- Removed a 3 pixel border that went around the entire desktop environment
- Improved system layout (GuiService)
- Statusbar: improved layout (mainly margin/padding)
- Toolbar: fixed margin/padding of all buttons, fixed alignment of all content
- Improved layout/UI of many apps

### Other
- Update LVGL to 9.3.0 official release (was dev version)

Tactility/Source/lvgl/wrappers/button.cpp

@@ -13,6 +13,7 @@ lv_obj_t* __wrap_lv_button_create(lv_obj_t* parent) {
 
     if (tt::hal::getConfiguration()->uiScale == tt::hal::UiScale::Smallest) {
         lv_obj_set_style_pad_all(button, 2, LV_STATE_DEFAULT);
+        lv_obj_set_style_radius(button, 2, LV_STATE_DEFAULT);
     }
 
     return button;