[UX] Provide users with control over the metadata displayed in their view

Summary

There is currently no way to limit what meta-data shows on Lists & the Child/Linked widgets based on various user needs and scenarios. This can make it difficult for users to parse/scan for the information they care most about.

Proposal

Introduce a display options menu which offers the ability to show/hide the various meta-data options we provide today.

List pages   ready  

• The display options that are selected should persist per "view" (similar to the pattern being followed in #501712 (closed)).
• The options presented should align to what is available from the specific view. For example, Iteration wouldn't be an option when viewing an Epic listing, since Epics do not have the Iteration field.

Metadata options

• Status
• Assignee
• Labels
• Weight
• Milestone
• Iteration
• Dates
• Health
• Blocked/Blocking
• Comments
• Popularity

Child / Linked widgets

• Assignee
• Labels
• Weight
• Milestone
• Iteration
• Dates
• Health
• Blocked/Blocking