### Problem To Solve When filtering issues, I want to filter by \~"group::portfolio management" `OR` ~"group::certify", so that I can see issues that have one `OR` (:rofl:) the other label. When filtering issues, I want to filter by assignee is @gweaver `OR` @hollyreynolds `OR` @kokeefe, so that I see issues that have... ### Proposal - Add support for OR between values of a given filterable key within the filter bar. - Only add support for OR to the `gitlab-ui` filter bar to prevent duplicating effort in parts of the code that need to be refactored to GitLab UI. #### MVC 1  #### MVC 2  ### Constraints - `OR` is limited to individual types of parameters `assignee = me OR you AND label = foo OR bar`, not `assignee = me OR label = foo` ### UI Design  _Shown using new dropdown styling, which is not required unless implemented across filtered search_ <details> <summary>More details</summary>  1. Show selected items at the top when the values are re-opened. 2. Consolidate selected items to "<#> items" when >3 are selected to save space. 3. Don't re-shuffle items while selecting, to prevent items from jumping around. </details> ### Tier gitlab~13116818 ### Implementation Parts * [ ] UX for using `OR` on a per parameter basis * [ ] Frontend * [ ] Issue Boards Side <!-- triage-serverless v3 PLEASE DO NOT REMOVE THIS SECTION --> _This page may contain information related to upcoming products, features and functionality. It is important to note that the information presented is for informational purposes only, so please do not rely on the information for purchasing or planning purposes. Just like with all projects, the items mentioned on the page are subject to change or delay, and the development, release, and timing of any products, features, or functionality remain at the sole discretion of GitLab Inc._ <!-- triage-serverless v3 PLEASE DO NOT REMOVE THIS SECTION -->