Fix: keyword not handled when app list is loading

[zjns]

If user has a lot of apps, more time loads are required, and the keyword entered at this moment should be handled when the load is completed.

[zjns]

这个问题确实存在，如果你觉得我的修复方法有问题，关了PR就是，就当我报了个bug，没必要一直搁置在这。