Added the ability to clear tags by category.
Added the ability to clear tags by category.

emergebtc/evennia,feend78/evennia,emergebtc/evennia,TheTypoMaster/evennia,mrkulk/text-world,ypwalter/evennia,feend78/evennia,jamesbeebop/evennia,feend78/evennia,feend78/evennia,mrkulk/text-world,mrkulk/text-world,titeuf87/evennia,ergodicbreak/evennia,titeuf87/evennia,TheTypoMaster/evennia,shollen/evennia,jamesbeebop/evennia,mrkulk/text-world,ergodicbreak/evennia,ypwalter/evennia,shollen/evennia,titeuf87/evennia,ypwalter/evennia,TheTypoMaster/evennia,emergebtc/evennia,ergodicbreak/evennia,titeuf87/evennia,jamesbeebop/evennia