大镜像组件导出应用模板后，无法导入

[PDMoFan]

有个16G和10G2个大镜像组件，导出应用模板后，在其他设备无法导入，会卡住不动，导入导出的2台设备环境都是一样的
环境：6.1.1快速安装rainbond

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Title: After exporting the application template of the large mirror component, it cannot be imported.

There are two large image components, 16G and 10G. After exporting the application template, it cannot be imported to other devices and will be stuck. The environment of the two devices imported and exported is the same.
Environment: 6.1.1 Quickly install rainbond

[zzzhangqi]

fix v6.1.2-release