Adjusted HTML files to make them responsive for better viewing on mobile (addressing issue #51)

[adamadavidson]

HTML adjusted to make them responsive and better sized when viewed on a mobile device. There should be no change when viewing these on tablets large screens.

Changes include:

• Making containers 100% wide on screens below the Bootstrap "lg" breakpoint. This removes the left and right outer margins, making the most of available space on small screens.
• Making the navigation menu collapse on small screens, to be replaced by a "hamburger" icon that then expands to show the menu when clicked. This required adding the Bootstrap js script to the footer (in order to make the collapsing menu work).
• Making all tables responsive so that they can be horizontally scrolled on small screens.
• Table items now centrally align vertically on the table rows (using the "align-middle" class).
• The config and auth pages have been adjusted so that the blue information/warning panel now stacks underneath the form (which then fills the full screen width) on small screens, so that the form is more usable.

[aceberg]

Hi! Merged your PR into separate branch to look at it first (image aceberg/watchyourlan:dev).

I agree with most changes, but:

• Bootstrap js link in the footer will mess up the Local network only option
• GitHub icon in navbar has wrong color in some themes

Can you, plese, split your chenges in 2 different pull requests:

• One with all the changes to containers and tables (will be accepted in main immediately)
• And other with navbar change and JS link (I probably have to tweak to allow local option)

[adamadavidson]

No problem, will do.

I know how to fix the GitHub icon colour, so will do that in the second PR. I couldn't work out how to deal with the Bootstrap js link in the footer, as I know nothing about Go or npm! I'd tried to follow the conditional mechanism in header.html but that didn't work for me. Will put the Bootstrap js link into the second PR in the hope that you can fix it :)

Thanks for looking at it so quickly!

[aceberg]

It's OK, I'll fix the JS link