[fb] Opening an empty file should not create a js error
HUE-2210 [search] Add a initial_gap in sync with gap for new facets or saved collection
[fb] Better error message when can't connect to HTTPFS
HUE-2371 [sentry] Sentry URI should be created only with a ALL permission

Set select2 to All and disabled it
HUE-2389 [impala] Expand results table after the results are added to datatables

Moved logic to the datatables draw callback
HUE-2219 [fb] Equivalent to the getmerge command

Python updates to support webhdfs concat api
FB UI updated to support "Merge" actions