revert 6a3015ea
[visualize] only read query from searchSource
[aggResponse/pointSeries] remove unneeded prop
[dashboard] wait for the panels that are already on a page to init before fetching
[dashboard] clean up search sources when panels are destroyed
Merge pull request #2267 from spenceralger/allow_settings_without_default_index_pattern

LGTM Allow navigating throughout settings without having a default index pattern
Merge pull request #2265 from spenceralger/only_read_query_from_searchSource

Only put query from searchSource into state
Merge pull request #2272 from spenceralger/dashboard_courier

Dashboard courier improvements