feat(boxjs): 一键订阅

新增(BoxJs): 支持 Stash

新增(BoxJs): selects (下拉) 控件

新增(BoxJs): 内置 Gist 备份及还原脚本. @dompling

Merge pull request chavyleung#364 from NobyDa/patch-1

修复(BoxJs): 部分情况手动运行脚本异常

fix(boxjs): backup data display bug

release(boxjs): v0.7.89

feat(boxjs): store each backup separately

fix(boxjs): language switching bug

fix(boxjs): language switching bug