Add support to prioritize repositories

[CloneWith]

Problem Due to my unstable Internet connection, some repositories are available, but not all of them are as fast at the same time. Then prioritizing them would be a good idea to somehow avoid such problems, since:

• When multiple repositories have the same version of an app, the one with a higher priority is shown and to download from first.
• Otherwise, new versions go first.

Solution Add a manual sorting function to the repository list. Users can simply drag them up and down to prioritize them.

Alternative Add an option to select the major repository, and always fetch APKs from this repo first (not so good but simpler).