I'd like this plugin to support fallback filters, that can be used to do one of the following things:

• include all jobs in a view if no jobs have been included by previous filters
• exclude all jobs from a view if all jobs have been included by previous filters

An unit tested implementation of this is provided in the attached patch.

When using filters to only show failing/building jobs on a Build Monitor View, this can be used to show all successful jobs when none are failing/building.