Fix saving after latest changes (Themes class was not used in the controller, so loaded for nothing)
Fix saving after latest changes (Themes class was not used in the controller, so loaded for nothing)

dimayakovlev/grav-plugin-admin,getgrav/grav-plugin-admin,Sommerregen/grav-plugin-admin,joomline/grav-plugin-admin,getgrav/grav-plugin-admin,Sommerregen/grav-plugin-admin,Sommerregen/grav-plugin-admin,dimayakovlev/grav-plugin-admin,Vivalldi/grav-plugin-admin,getgrav/grav-plugin-admin,dimayakovlev/grav-plugin-admin,joomline/grav-plugin-admin,joomline/grav-plugin-admin,Vivalldi/grav-plugin-admin,Vivalldi/grav-plugin-admin,dimayakovlev/grav-plugin-admin,joomline/grav-plugin-admin,Sommerregen/grav-plugin-admin,Vivalldi/grav-plugin-admin