Catalogs: Use parametric styling

[miili]

Use parametric styling for depth and magnitudes instead of static categories.

[MarioLocati]

@miili Thank you for the suggestion. I already thought about that. Do you have some code already available that provides these GUIs?

[miili]

Sure, the assistant is integrated into QGIS. This will open the size and colorbar dialogs

This will create the rule interactively, which looks like this

coalesce(scale_linear("magnitude", 0.202921, 1.51656, 0.1, 3), 0)

I think this will be easy to integrate, simpler then the categories.