able to fresh UI after deleting a issue in activity share
change sync update after editing issue
Merge branch 'master' of https://github.com/Jayin/SiyuanGroup.git

Conflicts:
	SiyuanGroup/src/com/alumnigroup/app/SyncData.java
	SiyuanGroup/src/com/alumnigroup/app/acty/Communication.java
	SiyuanGroup/src/com/alumnigroup/app/acty/GroupInfo.java