* Reuse existing gradient
* Double click to insert gradient stop
* Add history states to the gradient tool
* Do trig in viewport space so it is actually perpendicular
* Sync tool options with active gradient
* Deleting points with delete key
* More tolerance on inserting points
* Add the link button
* Transform around pivot
* Remove log
* Fix tests
* Add a hacky two-line layout for the checkbox
Co-authored-by: Keavon Chambers <keavon@keavon.com>