bringToFront optimization for large workspaces (#3214)
bringToFront optimization for large workspaces (#3214)

* bringToFront optimization for large workspaces


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