Slate Style Browser

This release is almost a rewrite of the whole code with many changes! The old name Slate Icon Browser doesn't fit anymore, so I renamed the whole plugin to Slate Style Browser.

What's Changed

• new UI
• support for many default widget types, including preview
• new code structure

New Contributors

• @DoubleDeez made their first contribution in #1
• @Periokumene made their first contribution in #5

Full Changelog: 1.0...2.0