Emoji smashes title lines

[websupporter]

If you have an emoji in your talk title, this emoji gets transformed into an image. This image is affected by the following CSS style

.video-list li img {
    min-height: 100px;
    width: 100%;
}

which should only be applied to the video thumbnail.

A screenshot of what I mean

Screenshot of stage area with emoji position over thumbnail

The emoji also takes the wrong position in the stage area if the video is in the sidebar as a thumbnail (see 2nd screenshot)

meta-2019.2.patch​ addresses comment:2 as well.

In 4068:

WordPress.tv: Ensure width and height rules intended for video thumbnails apply only to video thumbnails.

Otherwise, the rules were also being misapplied to emoji images.

Examples (views of same video):

• ​http://wordpress.tv/event/wordcamp-frankfurt-2016/
• ​http://wordpress.tv/speakers/christian-fuchs/

Props SergeyBiryukov.
Fixes #2019.