Blank page when no internet is available

[pokrakam]

When no internet connection is available(*), the web UI just shows a blank page.
The internet connection is needed to load the libraries, I guess adding them to the local MIME repository would be overkill, but OTOH it would be nice to show a message of sorts.
Low priority issue regardless.

(*) I discovered this while trying to use it on a flight... in the cloud, so to speak

[larshp]

yeah....