No "go to next" button in video player.

[1ncend1ary]

When I allow the player access to one folder and then play video files from another folder, I get no option to also allow access to this other folder. When I allow access to parent folder, playlist functionality doesn't work in neither folder.

Steps to reproduce:

1. Install latest from FDroid
2. Open file from folder1
3. Watch till the end
4. Get prompt

To automatically load external subtitles or enable skipping to next file in a directory, grant %s access to the topmost folder containing your videos (e.g. Movies)

5. Choose folder1
6. Playlist works for all videos in folder1
7. Choose video from folder2, a sibling to folder1
8. No prompt, no playlist functionality

folderX
├── folder1
│   ├── vid1.mp4
│   └── vid2.mp4
└── folder2
    └── vid2.mp4

OR

1. Install latest from FDroid
2. Open file from folder1
3. Watch till the end
4. Get prompt

To automatically load external subtitles or enable skipping to next file in a directory, grant %s access to the topmost folder containing your videos (e.g. Movies)

5. Choose folderX which is parent folder of folder1, folder2
6. Playlist works for all videos in folder1
7. Choose video from folder2, a sibling to folder1
8. No prompt, no playlist functionality

folderX
├── folder1
│   ├── vid1.mp4
│   └── vid2.mp4
└── folder2
    └── vid2.mp4