Add a quick retry entry when creating an mirror repository fails

[kerwin612]

Feature Description

Provide a quick retry button when creating an mirror repository fails (before the page is refreshed);
Avoid the need to manually delete existing records, and then click Create again to improve the operating experience due to network anomalies;

Screenshots

[kerwin612]

I'll try to implement this features in this branch patch-2.
Part has been commit (dad2132) and is being tested.