A couple of more issues with the new theme

[ccordoba12]

The new home page is looking really good! This is my second round of minor issues before considering it's done:

1. We need to change the current favicon because it's using the icon from the old site in Firefox and the Hugo icon theme in Chrome.
2. Navbar sections are not changing when moving from one section to another. For example, Componets is not selected after entering that section.
3. I don't like that the banner is expanded to the full window width. We should set a maximum width (perhaps 700px, I don't know).
4. We should only display the working links that appear below each member of the Team. I mean, for example if someone doesn't have an Instagram account (me) that link and icon shouldn't be displayed.
5. The Plugins section background should be light gray (as the Overview one), the Team background should be white and the footer one should be light gray. That way we will be alternating between those two colors in the whole page.