don't broadcast x.grp.mem.del when removing group member with status "invited" (#169)

src/Simplex/Chat.hs

@@ -281,7 +281,7 @@ processChatCommand user@User {userId, profile} = \case
       Just member -> do
         let userRole = memberRole membership
         when (userRole < GRAdmin || userRole < memberRole member) $ chatError CEGroupUserRole
-        sendGroupMessage members . XGrpMemDel $ memberId member
+        when (memberStatus member /= GSMemInvited) . sendGroupMessage members $ XGrpMemDel (memberId member)
         deleteMemberConnection member
         withStore $ \st -> updateGroupMemberStatus st userId member GSMemRemoved
         showDeletedMember gName Nothing (Just member)