Drag & Drop Textarea Columns / Inspector Favorites

# Problem

Right now the only way to reorder the columns of the tree table is to click the little arrows that appear when hovering over the header:


This is annoying UX and drag & drop would be much nicer. However, drag & drop in react is a little complicated, so I didn't implement it yet.

A similar issue exists with the favorite rows in the inspector.


# Proposal

Experiment with the different drag & drop libraries for react, potentially in a standalone project and create a prototype for drag & dropping table columns and rows.

Then try to apply this approach in a PR to the tree table or inspector (whichever is easier first), and eventually so it for both.