No error handling for filter field on workout view

[Gregory Smith]

If you put something in the search field in the workout view that does not appear in any workout names, you get a 404 Error. I think this should remain in the workout view with no workouts listed.

[Sander Roosendaal]

@gregsmith01748 Is this on the production server? Can you reproduce on dev?

[Sander Roosendaal]

fix #466

→ <<cset 6ca4039a5b81>>