Behavior of the program
When u go into any playlist, the thumbnail on the left rarely matches the actual thumbnail.

Expected behavior
Thumbnail of the playlist must match first video in list.

To Reproduce
Please add all steps to reproduce the behavior:

1. Go to any playlist
2. See thumbnail mismatch

Link to video
None.

Screenshots
![Capture](https://user-im

Hello. I'm new to instaloader.
I've been using the following code to get a list of comments on a specific post:

    loader = Instaloader()
    insta_post = Post.from_shortcode(loader.context, SOME_POST_SHORTCODE_HERE)
    comments = insta_post.get_comments()
    # later logics here

it gives me a fine iterator of PostComment objects. for every comment you could use following attribu

Using the Web interface in Chrome (and in the Android app), and noticed this hanging out in the console:

[Deprecation] document.registerElement is deprecated and will be removed in M73, around March 2019. Please use window.customElements.define instead. See https://www.chromestatus.com/features/4642138092470272 for more details.

(anonymous) @ paper-icon-button-light.js?v=10.1.0:15

Please support themes

https://github.com/jellyfin/jellyfin-kodi/blob/114e34b861d36f5b8ab98459ba8c5aeedc5058ca/resources/language/resource.language.en_us/strings.po#L571

This string reads: "Find more info in the GitHub wiki/Create-and-restore-from-backup."

However, this repository doesn't have a wiki. I assume it's referencing this: https://github.com/CodingForVega/plugin.video.jellyfin/wiki/Create-and-restore-fro

Would be cool to have Dark Mode integrated earlier, saves us time if we implement it incrementally.