Fix inserting into middle of stack from flyout (#3058)
Fix inserting into middle of stack from flyout (#3058)


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