Allow user to choose default view for Initiatives Merged

The default initiatives view does not serve many tactical or review use cases. We use the workflow view as a way to drive tactical conversations and to inform planning for upcoming work between our teams.

As a product owner/product manager, I want to be able to easily navigate to the workflow view of initiatives so that I can review and prioritize ongoing initiative work for updates with my engineering and implementation teams.

As a product manager, I want to prioritize my initiative authoring using a combination of filters and workflow statuses so that I can focus my time on my highest need items.