Texture Painting Quick Settings UV/Grid

When painting on a UV map in the image editor sometimes a quick switch on/off of the UV islands is nice to have without going to the pull down menu every time..

Also quickly changing the checkerboard pattern is handy when contrast makes it difficult to see the islands/textures

I've made a quick addon to do all this, but it would be nice to have that default in blender. github.com/kostex/blenderscripts/blob/master/KTX_UVEditorSettings.py