Fixes #29331 - use patternfly v4 fonts

Fixes #13936 - Drop support for legacy browsers

This patch removes various workarounds needed to get legacy browsers to
work. Mostly stuff needed for IE<10, but also some other vendor prefixes
that are no longer needed.

Fixes #13741 - Prevent hidden parameters from erasing newline

Switching the input from textarea to password leads to all newline
characters being stripped from the value. This PR attempts to prevent
this by changing the font of the textarea to a font that displays a...

new top-bar navigation design and a new login page