Clear selected filter after it is deleted or reset button is pressed.
Clear selected filter after it is deleted or reset button is pressed.

Not clearing the filter after filter is deleted is causing to show "Delete" as enabled after filter is deleted and pressing it again throws an error.
This also removes empty parenthesis in the title on Advanced search modal when Delete/Reset is pressed.

https://bugzilla.redhat.com/show_bug.cgi?id=1298645
https://bugzilla.redhat.com/show_bug.cgi?id=1314434

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