Keyboard shortcuts (Copy/Cut/Delete) not working with Lasso selection in certain states

[bmouse116]

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Description

Keyboard shortcuts (Ctrl+C, Ctrl+X, Delete) do not work when blocks are selected using lasso selection (drag-to-select), especially when the multiple selection mode is toggled via an external button rather than holding the Shift key.

Expected Behavior

Selected blocks should be deleted or copied.

Actual Behavior

Nothing happens because Blockly.common.getSelected() does not always return a MultiselectDraggable instance in this specific state, even though dragSelection is populated.

Reproduction steps

1. Enable multi-select mode (e.g., via a toggle button that activates the mode).
2. Select a group of blocks using the lasso/rectangular selection.
3. Press Delete or Ctrl+C.

Stack trace

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