[IMP] More filtering options for TaskAdmin
[IMP] More filtering options for TaskAdmin

cateee/fosdem-volunteers,FOSDEM/volunteers,jrial/fosdem-volunteers,cateee/fosdem-volunteers,cateee/fosdem-volunteers,jrial/fosdem-volunteers,jrial/fosdem-volunteers,FOSDEM/volunteers,cateee/fosdem-volunteers,jrial/fosdem-volunteers,FOSDEM/volunteers,FOSDEM/volunteers