[BUG][数据源]功能菜单配置[数据表]的[表关系管理]时，当一个数据表字段非常多时（超出几个屏幕显示范围），无论是按住CTRL键缩小画布，还是滚动画布，都无法把有关联的2个表的字段建立关联关系！

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[数据源]功能菜单配置[数据表]的[表关系管理]时，当一个数据表字段非常多时（超出几个屏幕显示范围），无论是按住CTRL键缩小画布，还是滚动画布，都无法把有关联的2个表的字段建立关联关系！
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