refactor(core): rename APP_NAME to 'modus', cleanup shared widgets

- Change APP_NAME from 'modus1' to 'modus' in shared/data.py
- Remove unused flat_scale widget
- Add missing imports in animator and customrevealer
- Delete src/utils/uinput.py (unused)
- Remove unused import in utils/functions.py

src/shared/widgets/animator.py

@@ -172,6 +172,7 @@ class Animator(Service):
         self._max_value = 1.0
         self._repeat = False
         self._duration = 0.8
+        self._bezier_curve = (1, 1, 0, 0)
         self._timing_function = timing_function
         self._tick_widget = tick_widget
         self._tick_interval = tick_interval