Adding data sources to SyncControl is not always reflected in context menu, and init/valid time range is off for some data sets after restricting
Followup to !441 (merged) The context menu should show the data sources the sync control is currently restricted to. This is shown if the data is loaded on system start, but not if it is loaded via the add dataset dialog.
Also, the data starts as valid time at 00 UTC and not earlier. Seems to be a range issue.