[dashboard] wait for the panels that are already on a page to init before fetching
[dashboard] clean up search sources when panels are destroyed
Closes #2269 - Restore query and filter from dash.searchSource.getOwn('filter')
Merge pull request #2272 from spenceralger/dashboard_courier

Dashboard courier improvements
Merge pull request #2273 from simianhacker/fix-2269

Closes #2269 - Restore query and filter from dash.searchSource
fixed malformed html entities
remove request clipboard copying, in lieu of fixing #1879 for now
tweak the sorting test data, tests still pass
add failing test for sorting by new column
fix sorting on new columns
Merge pull request #2275 from w33ble/fix/paginated-table-sort

Fix/paginated table sort