more precise visual feedback when adjusting volume using keybinds

[MariusAlbrecht]

Is your feature request related to a problem? Please describe.
Currently one out of two icons is shown which purely reflect whether the volume is being increased or decreased. This does not give any feedback about the player volume.

Describe the solution you'd like
Show the actual textual volume percentage like youtube does it

Describe alternatives you've considered

1. show the volume control bar as if the volume icon had been hovered by the cursor
2. show the "increase" and "decrease" icons only if the volume has actually been changed (ie dont show it if "increase" is pressed while volume is at 100%)

these both seem less precise and unintuitive as media control feedback on keybind use is normally shown as an overlay icon

Additional context
I feel feedback about the current player volume is necessary because the player volume is not the only factor which determines actual output volume.
Consider the following scenario: system volume is at 10% and player volume at 90%. Now a user would try to increase the player volume, get visual feedback about an increase but observe very little actual change.