Support sorting or filtering of initiatives

[davidascher]

We end up with enough initiatives in /now for example that I kinda want to be able to sort & filter them when reviewing the plan on the first monday. Sort by tag, or sort by owner. And filter based on ideally everything (owner name, issue name, issue body, and label names).

[davidascher]

Actually, don't need sorting as much as grouping

[davidascher]

Filtering in, using titles, bodies and labels. it helps. Will close this issue for now. Can create issues for follow-on bugs.