Use tintable icons instead of custom coloured icons

I think that currently each icon in the "Personalization" menu is created individually for each available color, as it is possible to set an app color and use an icon of a different color.

I think it would be better to get rid of all these icons and just keep the first ones the app came with, but make them tintable and change their colour when the user selects a different app colour (this would also allow to use the dark icon with gradient).

It's common behavior in iOS apps.