Ability to Change Niagra button to Custom Icon

[Cod3rQwerty]

Is your feature request related to a problem?

I feel like the niagra button looks kinda ugly with a lot of wallpapers, so I think it would be nice if you could set the niagra button to an icon, just like you can for an app.

Describe the solution you'd like

I think the best way to implement this would be to make it so when you hold down on the niagra button, you get the option to change it to a different icon.

Feature Request Procedure

• [X] I have read the knowledge base article on feature requests and followed the steps mentioned

[SkywardShadow]

I've just subscribed to Niagra, and this is my first/top request. I have the watercolor icons installed and would love to be able to theme the Niagra button to match them.