migration to remove deleted tags from tasks
remove need to refresh after having accepted party invite
revert previous commit, reload after party invite accept
add ability to group leader to remove members, fix #1639
removeMember return whole group
Merge pull request #1654 from HabitRPG/paglias/remove-deleted-tags

Migration to remove deleted tags from tasks
always use removeSelf only for parties
port member modal to group members list, fix #1656
dismissable errors and warnings, fix #1580
remove donate button from front page, fix #1617
port group websites
port assign group leader
remove old code
set back some derby code