Explore options for additional right-click behaviour within the editor canvas and other areas

[andrewserong]

In #50273 the List View added right click behaviour to open up the block settings menu when right-clicking on a list view item. Which other areas in Gutenberg could benefit from a Gutenberg-specific right-click contextual menu? This issue is to gather ideas, potential designs, and discuss concerns or benefits of the feature.

Some ideas:

• In the editor canvas, open up the block settings menu
• In the editor canvas, use right click to allow inserting a block or pattern anywhere within the canvas, without having to click on the block inserter / appender button
• In data views (e.g. pages within the site editor), open up the actions menu to allow quickly editing or deleting pages

Benefits

• Easy access to block-specific controls and actions
• More easily perform quick actions like duplicating and deleting blocks
• Potentially more easily insert a block at any arbitrary location

Considerations

The browser's contextual menu includes many controls that users rely on when editing content. If considering replacing in the editor canvas with a custom contextual menu, some things to watch out for:

• Needs cut/copy/paste controls for partial selection
• Needs select all button
• Open link in new window behaviour
• Some folks might depend on the speech or services options under the browser's contextual menu

[fabiankaegy]

A pattern that I have really come to appreciate from places like YouTube is that when a context menu takes over the browser default behavior, a second right click within a short timeframe then allows the event through and opens the browser native menu.

This elevates the need to duplicate all the things.