Widget breaks entire UI when offline

[defsteph]

When developing offline, the PowerSlice widget breaks the EPiServer UI with JS errors, since it cannot reach the find index online.

This could probably be fixed by handling Exceptions from find searches more gracefully.

[defsteph]

This issue should probably be closed, since it got merged in May. It is included in the 3.0 release, but not in 2.1.6. AFAIK there was never a public release of 2.1.7 that this fix should've been included in as well.