feat: Make toolbox & flyout properly focusable.#225

BenHenning merged 9 commits intoRaspberryPiFoundation:mainRaspberryPiFoundation/blockly-keyboard-experimentation:mainfrom

BenHenning:make-toolbox-properly-focusableBenHenning/blockly-keyboard-experimentation:make-toolbox-properly-focusableCopy head branch name to clipboard