[Feature Request] Pop up window warning for playlist id conflict

[ibin7777]

Is your feature request related to a problem? Please describe.
When trying to add someone else's favorite list or adding any list with the same ID to an exsisting one, absolutely nothing will happen, leaving user a bit confused.

Describe the solution you'd like
A pop-up window telling user that there's exsisting playlist that shares the same ID, give user option to either:

1. Generate another ID for the newly added playlist
2. merge with the exsisting playlist (Could be messy when considering playlist title/description/icon merging solution)
3. Replace the existing playlist
4. Cancel/abort

Describe alternatives you've considered
Or just a warning window telling user what's going on is ok too I guess.
Now that I think about it, this could be the better solution considering not every user knows what ID is, which might lead to further confusion.

Additional context
Add any other context or screenshots about the feature request here.