Describe the bug
With a catalog that points to an intake server, the click on a run and note that you do not see a preview in the preview widget. This is accompanied by an error in the log:

Wed Jul 15 13:23:12 2020 - logError - ERROR - MainThread >
The following error was handled safely by Xi-cam. It is displayed here for debugging.
Wed Jul 15 13:23:12 2020 - logError - ERROR - MainThread >
Traceback (most recent call last):
File "/home/dylan/work/xicam/Xi-cam/xicam/gui/bluesky/databroker_catalog_plugin.py", line 51, in preview_entry
self.sigPreview.emit(catalog)
TypeError: SearchingCatalogController.sigPreview[BlueskyRun].emit(): argument 1 has unexpected type 'RemoteBlueskyRun'

This is because the signal in SearchingCatalogController is defined to pass BlueskyRun. For a remote catalog, the run is actually a RemoteBlueskyRun, which does not inherit from BlueskyRun.

One option would be to change the signal to accept an object or a Catalog. Not sure the right path there.