Move 'Link display' setting out of the Pager section

Problem/Motivation

The Views Link display setting is currently located under the Pager section for display types such as Block and Embed.

This is confusing because the setting is not specific to paging. It determines which routed display an unrouted display links to, and can affect behavior such as exposed forms and their reset/action URLs.

This came up while working on #2840283: Views exposed form action incorrect when view also has a page display: Views exposed form action incorrect when view also has a page display, where the setting was easy to miss because of its placement.

Proposed resolution

Move the Link display setting out of the Pager section and place it somewhere that better reflects its display-wide purpose.

Remaining tasks

• Decide where the setting should live in the Views UI.
• Update tests as needed.

User interface changes

The Link display setting will move to a more appropriate section of the Views display configuration UI.