Moves setCollapsed to after mutation (#3591)
Moves setCollapsed to after mutation (#3591)


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