Board header button rearrangement

Following up from a conversation with @nickleonard at Summit in Las Vegas.

This issue covers some changes to make the header on a board less crowded, so that the search/filter bar has more room and less commonly used items do not take up scarce horizontal real estate.

A few prospective changes:

1. move "Add list" to an element that's inline with the existing lists, out of the header
2. Move options into a menu
   1. group by
   2. show labels

Prior art/resources

• #374580 (comment 1109948388)
• #341787
• https://www.figma.com/file/8Pk11f6OWpaed8rotF40xn/Issue-Boards?type=design&node-id=322-27757&mode=design

Proposal

• Create a new disclosure/menu for "View options"
  • Relocate the Labels toggle to be in this menu
  • Relocate the "Group by" option (on Issue boards) to be in this menu, and change the terminology to "Epic swimlanes" which is more descriptive of the feature
  • Include a tooltip of "View options" for the trigger button
• Change the "Edit board" button to an Icon button
  • Include a tooltip of "Configure board" for the trigger button
  • Update the title of the modal to "Configure board"
• Relocate the "New list" button to be at the end of the column list in the board rather than the header
  • Use the default button style rather than the confirm style
• Relocate the "Delete board" option to be within the "Configure board" modal (currently this is in the board selection drown).
  • Moved to #459029 (closed)
• Introduce ability to add a new list in-between current lists
  • Moved to #459029 (closed)

Figma designs

Prototypes

• New List – Button Relocation
• New List – Between Lists (this can be broken out as future enhancement)
• Menus & Tooltips