As a Product Owner I want to highlight rather than filter certain Product Backlog Items in Plan View so that I can still rank PBI in comparison to unhighlighted PBI

Acceptance Criteria

• Quick Filters can be toggled to highlight rather than filter. Options depending on usability considerations:
  • either in the creation screen (=> something is either a quick filter or a quick highlight)
  • or in the plan view itself (=> quickfilter can be used eithier for filterering or highlighting)
• Plan views shows highlighted and non-highlighted items, ranking is possible between these
• I can highlight, for example
  • duedate <= "4w"
  • priority = Blocker
  • risk >= 5