[WIP] Feature/285/customgallery

[newhinton]

This implements #285

[newhinton]

@IacobIonut01

I have now implemented the core functionality of custom albums. They are based on the original albums, and not every feature works. (Eg. pinning, album previews)

Besides a code-review, there is also a bit of cleanup todo, especially for the strings, since i changed albums to folders. There are probably quite a few missing. My reasoning for this is that it makes more sense, since it actually behaves exactly like the folders in a files app. Also, having three different "album" types might be confusing (Folders, custom albums, dynamic albums)

[IacobIonut01]

I'll review this weekend and do the changes accordingly. Thanks

[IacobIonut01]

Opening media inside the custom albums also don't work

[newhinton]

Opening media inside the custom albums also don't work

Oh yeah, i can see that. I'll take a look later!

[newhinton]

Hm, i only used the TimelineScreen like the album does. I cant see whats wrong, sorry