* Do not select layer immediatly on drag
* Add LayerReferenceInput MVP widget
* Properties Panel
* Fix dragging marker flicker
* Change mask shape to outline
* Add mask rendering
* Simplify select code
* Remove colours
* Fix inpaint/outpaint and rearrage widget UX
* Add mask blur and mask starting fill parameters
* Guard for the case when the layer is missing
* Add icon to LayerReferenceInput to finalize its UI
Co-authored-by: Keavon Chambers <keavon@keavon.com>