Feature request: sub-cosplay tag automatic implication

Sometimes when a character has a large amount of cosplays, cosplays of their official alternate costumes might receive their own tags. So it often occurs that the sub-cosplay tag is added but the main one isn't. If we can make them inherit the same implications their character tags have, it can save some gardening.

In most cases, sub-cosplay tags are not necessary.

Alternate costumes should almost never be given their own cosplay tags. All it does is complicate searching and add unnecessary tag padding.