Dsh Fetch Models Unselect All

Key features

• Pure client presentationwatches the DOM for the fetch dialog (anchored on its unique "Add selected" action), then clones the Cancel button's classes to insert an identically styled "deselect all" button left of it.
• Clicking it unchecks every model checkbox and dispatches a native change event per row, keeping the dialog's React-controlled selection in sync — "Add selected" then adopts nothing, exactly as if each box were cleared by hand.
• No host code, no RPC, no settings, no session events.
• The observer is disposed with the plugin fiber