[QA] The spacebar cannot toggle pause/play when in fullscreen mode

[jnweiger]

Tested in files_mediaviewer 1.0.4 with google chrome

click an mp4 video file and click the lare play icon in the midle of the video. It starts playing.
Click the small [||] pause icon. The video pauses.
Press space, the video continues playing, press space again, the video pauses.

Switch into full screen mode with the [::] icon. Start the video.
Click the small [||] pause icon. The video pauses.
Press space, nothing happens.

Expected behaviour: spacebar works the same in normal and in fullscreen mode.