* feat!: reworked config options for fullscreen scale adjustments
Removed options:
```
timeline_size_fullscreen
controls_size_fullscreen
volume_size_fullscreen
menu_item_height_fullscreen
menu_min_width_fullscreen
top_bar_size_fullscreen
```
Additionally, `ui_scale` has been renamed to `scale`.
The scaling can now be controlled by these two new options:
```
scale=1
scale_fullscreen=1.3
```
closes#543
d2febcbd47