Dashboard: When the 'success' filter empties the experiments table, the UI incorrectly "halts"

[urig]

Steps to reproduce:

1. Create a new Entropy project and an experiment in it once.
2. Open the dashboard on the project and see that the experiment run appears in it.
3. If the experiment succeeded, uncheck the checkbox for success (✔), otherwise do the same for the failure checkbox (❌)

Expected behavior:

The experiment table should appear empty but otherwise the dashboard should remain functional.

Actual behavior

A modal window blocks access to the dashboard. You cannot use the dashboard unless you refresh the browser page.

[urig]

@galwiner did I write this up correctly? :)