This basically undoes commit a8c7fba and properly fixes the issue:
it seems Google moved the images in a separate child `img` tag, under
what I was previously looking for. Furthermore, the src is not a URL
anymore, but directly the image encoded in base64. Fortunately, we
can match the last characters against images obtained from their 48px
and 64px endpoints. More details here:
https://github.com/valinet/ExplorerPatcher/discussions/755#discussioncomment-5353030
It seems Google has introduced a bug, where they do not change the
main image when changing to another day in the widget. Hopefully they
will fix it in the future.
It seems Google changed the widget and explicitly set a background
color, so this patch takes that into account and removes it.
Previously, the widget did not have a background, rather inheriting it
from the `body` element.
Valentin Radu