优化大量节点时卡顿问题。主要是通过减少布局循环、仅处理变动节点和连接线只画可见区域得线来解决。增加shift多选功能。 #1073
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优化大量节点时卡顿问题。主要是通过减少布局循环、仅处理变动节点和连接线只画可见区域得线来解决。增加shift多选功能。