css for small screens

[hjf]

I modified the CSS and added some media query directives for small screens. This allows me to run WebWSPR in Chrome in Kiosk mode in an inexpensive 480x320px screen for Raspberry Pi. I removed several not important sections from the screen and stacked the panels. All controls were removed since this is meant to be read-only. There is a slight issue with the table not fitting the width that I'm still investigating so this may need some more tweaks.

Here's a screenshot of what it looks like:

https://i.imgur.com/12Q8Zs4.png

Here's a photo of it in action https://i.imgur.com/FluPqnr.jpg

and also a commit piggybacked and fixes #1 as well

[AA7US]

Nice improvements hjf!