Bug fixes and UI updates for datasources (#1618) (#1625) #1793

Job	Run time
Run test group of app_analytics_test	19m 12s
Run test group of datasources_test	10m 37s
Run test group of event_analytics_test	22m 10s
Run test group of integrations_test	12m 41s
Run test group of metrics_analytics_test	12m 1s
Run test group of notebooks_test	14m 38s
Run test group of panels_test	15m 13s
Run test group of trace_analytics_test	27m 29s
	2h 14m 1s

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