Redesign app about opsdroid-web

[FabioRosado]

Two more updates, here's the settings tab. I'm considering changing the icons on the navbar to include just settings and maybe that connect icon with "connected/disconnected" text. Hitting that will toggle the connection component.

This is the two themes, dark and light for the blue accent colour

[Cadair]

I wonder if you could turn the dark blue colours into a dark theme and the light green into a light theme and have them both?!

[Cadair]

The light colour text entry box contrast is a little low, you might be better off going for black. I think the black on green contrast for the chat bubbles is easier to read though.

[FabioRosado]

Thank you for the feedback Cadair! That makes a lot of sense I'll address your comments on the contrast.
I've also had a bit more thought and I think it would be nice to offer the two colours as accent colours, plus a dark theme for both. Hopefully this won't be too tricky to implement