Listen to focus events on children and add a focused class in the dropdown (#2848)
Listen to focus events on children and add a focused class in the dropdown (#2848)


rachel-fenichel/blockly,rachel-fenichel/blockly,mark-friedman/blockly,mark-friedman/blockly,google/blockly,google/blockly,picklesrus/blockly,picklesrus/blockly,mark-friedman/blockly,google/blockly,picklesrus/blockly,mark-friedman/blockly,rachel-fenichel/blockly,rachel-fenichel/blockly,google/blockly,mark-friedman/blockly,rachel-fenichel/blockly,rachel-fenichel/blockly,rachel-fenichel/blockly,google/blockly,google/blockly,google/blockly,mark-friedman/blockly