feat: allow for toolbox with multiple tab stops #358

rachel-fenichel merged 2 commits intoRaspberryPiFoundation:mainRaspberryPiFoundation/blockly-keyboard-experimentation:mainfrom

microbit-matt-hillsdon:toolbox-focusmicrobit-matt-hillsdon/blockly-keyboard-experimentation:toolbox-focusCopy head branch name to clipboard