Hotfix 3.5.2
fix arrayindexoutofboundsexception

-
always update existing objects
set a runnable which will be executed on pull to refresh
avoid NPE
let EmptyViewAdapter implement PollAdapter
2938-bug-when-being-blocked-by-someone

- changed "state no connection" to "state error"
- display error msg from exception is we have one
Calculate empty view height properly