Add hint on how to change color of icon

[mariusheine]

Clear and concise description of the problem

There is this "copy with color" checkbox but it was not obvious to me what color is copied. By incident I found out that you can change the color of the icon by clicking on the icon preview. This is not very obvious.

Suggested solution

I would suggest to simple add a hint below the icon preview "Click on icon to change color".

Additionally it maybe would make sense to add the currently active color in the checkbox label e.g. copy with color "${selectedColor}"

Alternative

No response

Additional context

No response

Validations

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• Read the Contributing Guide.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[mariusheine]

And while using this feature now we just stambled across a small UI glitch when you have light mode active on your system and pick white as the icon color you don't see the icon anymore. Maybe we can also add some automatic contrast-rich background-color calculation. Something like if calculated icon brightness is <= 0.5 then we use white as background for the preview otherwise we use black as background