Responsive size for image upload dialogue

[HarHarLinks]

Is your suggestion related to a problem? Please describe.

The file upload dialogue previews an image to confirm upload. This dialogue is ridiculously small on a big screen - by far smaller than the thumbnail maximum.

Here is element fullscreen on a 1440p screen (minus browser + OS frame):

Describe the solution you'd like.

A more adequate size, responsive to the window size. It is probably reasonable to use the same size at which a thumbnail would display, as seen in the timeline in the background.

While at it, the dialogue could also show some basic info like dimension, duration, ... depending on media type.

Describe alternatives you've considered.

no

Additional context

no