Downloads bugged for files with the same title

[ClemCa]

Expected Behavior

Downloading two doujins with the exact same name (for example two volumes of the same series) would be completely fine.

Current Behavior

Starting the second download immediately halts the first and puts the second in indefinite loading. If the first was already downloaded, it just won't.

Possible Solution

Considering the folders are directly named by the titles, add conflict checking, and add a number at the end as a potential way to deduplicate files with the same name but different IDs. This would require some level of modification, but hopefully not too much.