Great Work, solid Standalone Popup Plugin

Hello, thanks for the work. It’s not easy, to find good standalone Plugins these days. Two Things we would love to see are:

• Better design in the Backend editor, like providing a wrapper for all elements which are responsible for one Popup Block. Adding padding to the title input. Consider a custom background, because titles are not readable, when the Popup Block is based on a group with a dark background.
• Changing the preview background color, to the one, selected in the options.
• And using native Gutenberg wordpress/elements for options/inputs would really smoothen the experience of an editor and would make this plugin feel much more native