[BUG] All Respack will be Removed while importing Unexpected Respack since v0.7.0

Affected Version: v0.7.0, v0.7.1, v0.7.0-rc1. v0.7.0-rc2 Not affected: v0.6.7 Happen since 65869b0 ## Reproduce (Tested on Android and Windows) 1. Import a normal respack 2. Import a chart as respack (by [ + ] in respack view, or by Android "Open in") 3. ``` Failed to import respack. Caused by: 0: invalid info.yml 1: missing field `author` ``` 4. `data/respack` is deleted now (***All Respack will be deleted***) 5. *[since v0.7.1]* If you try to visit those respack now ``` Failed to load respacks. Caused by: 系統找不到指定的檔案。 (os error 2) ``` 6. Now, those respacks is still in `.config.respacks[]` of `data/data.json` 7. Rescan to clear them from list if you enter the Respack view again ### Other case - Tested with a `hitFx: [0, 7]` respack, this deletion WON'T be triggered - If you have selected your respack before you import the chart (as respack), the respack preview will keep there (not refreshed). And then, play any chart: ``` Failed to load the beatmap Caused by: 0: Failed to load resources 1: Failed to load resource pack 2: 系統找不到指定的檔案。 (os error 2) ``` ## THANKS Thanks for the comment by 带着星星远航 in QQ: > 好像是我不小心把谱面当成资源包导了，报错后退出重进就这样 [04-12 21:54] And the comment by mxsyjkm > 如果导入铺面时候不小心点到资源包会导致资源包全部销毁0.71 [04-11 23:47] ## Related Player Comments: #750