Feature request: Clear Website Data button in site preferences

[TriVoxel]

I'd like to have a button in here to clear website data, such as cookies, cache, etc. This would be nice, as users may want to do this every now and then, and they'd probably rather not delete and re-make the pin. It would fit in right next to the delete tab button, and could be in the same style, but say "Delete Data" instead.