Store names of MET filters in metainfo

Is is currently difficult (for me) to figure out which MET filters are 1) available and 2) used. I think the list of filters should be stored in the metainfo.

added Wishlist label

marked this issue as related to #134

added to epic &3

added changepatch statusto do typesoftware labels

Done in !209 (995ba2a8).

closed