- Reformat styles

- Reformat styles

- Reformat styles

- Reformat styles

- Reformat styles

- Reformat styles

- Reformat styles

Refactor/remove flex layout commmon

- Reformat styles

- Reformat styles

- Reformat styles

- Reformat styles

- Reformat styles

- Reformat styles

Feature/keypad has backspace

For all other input assistance presets, the status of the backspace key
is fixed.

[player] Add calculation of pages minimal height in column alignment

Refactor/remove flex layout module in player

Replace resize event listener with ResizeObserver to also detect size
changes of the surrounding grid

- Replace UpdateTextareaPipe with DynamicRowsDirective

The dynamic height of the textarea is calculated based on the available
width. However, accessing the width of the textarea often results in an
error.
For this reason, the calculation is now done using resize and change
events in conjunction with a timeout to wait for the textarea to render.

Media elements needs time to load and change the dimensions of the page

#441

- Use scss extension fpr styles file

[player] Fix unit test for FloatingMarkingBarComponent