Content-only locked patterns: move "Modify" to elllipsis menu

[jasmussen]

Followup to #43037. When you add "templateLock":"contentOnly" manually to the code of a group block (no UI yet), the pattern becomes content-only locked and flattens nested blocks, for simpler editing:

There's a big "Modify" button in the toolbar, which unlocks the patterns you can edit, delete, move around nested blocks.

• Let's move this button to the ellipsis menu, to reduce its prominence.

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An adjacent question/conversation is whether we should rename the button to "Edit", and have it invoke focus mode at the same time. This could use design feedback. CC: @WordPress/gutenberg-design

[jasmussen]

Added "Needs dev" as the moving to ellipsis menu task can be completed now, despite the open question.

[jasmussen]

Related: #45264

[jameskoster]

Considering #45264, 'Edit' may be out of the question.

no UI yet

Perhaps we should explore this first? It may be that the solution is a toggle, which could make the 'modify' button unnecessary.

[jasmussen]

'Edit' may be out of the question.

Actually I thought it neat to combine the two. Modify and Edit could be the same, no?

[jameskoster]

Oh yes, that would be good to try :)