The web interface now looks a bit better with some CSS styling. This is the first time that I've had a go at playing around with CSS media queries in order to make things looks a bit better and functional on my phone. Before I had to zoom in on the buttons, but now they are plenty big. I still of course have some more tweaking to do to it. Before/after potos below:

I also made a few changes to the php files, mainly fixing up some error/success messages. I posted the updated version as beta 1.5.