鼠标移入canvase上的组件，只有下半部分能触发moveInNode

[hyzhangs]

"@topology/activity-diagram": "^0.3.0",
"@topology/chart-diagram": "^0.3.0",
"@topology/class-diagram": "^0.3.0",
"@topology/core": "^0.5.6",
"@topology/flow-diagram": "^0.3.0",
"@topology/layout": "^0.3.0",
"@ant-design/compatible": "^1.0.8",
"@topology/sequence-diagram": "^0.3.0",
"file-saver": "^2.0.2",
"moment": "^2.29.1",
"antd": "^4.15.0",

拖入到画布以后 鼠标从组件上半部分移入不会触发moveIn 事件