For devices that have a screen size so small they have to use the `max-width` property in CSS, the standard of a screen-size that has to be used here is `phones 600px and smaller`, not `900px`, which would have to use the `min-width` property instead, that would mean a widescreen size, because `min-width` means `a screen size of 900px, or more`, including desktops.
* Better contrat for input fields
This change set a white background for input field (text, select and textarea)
to have a better contrast with the page background and improve accessibility for
people with vision problem, and just crappy screen.
This change also remove the round corner for the input to have a clear difference
between editing field and buttons.
This max-width of the form element are a bit bigger too.
* Less space between label and input
