Revert "feat: Make toolbox and flyout focusable"#8931

RoboErikG wants to merge 1 commit intorc/v12.0.0RaspberryPiFoundation/blockly:rc/v12.0.0from

revert-8920-make-toolbox-and-flyout-focusableRaspberryPiFoundation/blockly:revert-8920-make-toolbox-and-flyout-focusableCopy head branch name to clipboard