Allow deletion of themes from web interface
|Reported by:||DD32||Owned by:|
In addition to allowing theme install from the administration area(#8652), It'll probably be a good idea to allow themes to be deleted from the themes page as well.
This would also allow users to get rid of any themes they no longer require the use of which is 1 downside mentioned of #8661(give themes a update bubble like plugins)
Of course, It'd need to ensure that a parent theme is not deleted (Or rather, A Parent theme is warned about before being deleted).
Setting to 2.8 for now.