Brand box float style

[spelkey-ucd]

If the brand box is floated, it should be full width on mobile. See this news article for badness.

Should remove the style attributes on the twig file, and make a few new css rules:

@media (min-width: 768px) {
  .brand-textbox.u-align--right, .brand-textbox.u-align--left, ucd-theme-brand-textbox.u-align--right, ucd-theme-brand-textbox..u-align--left {
    max-width: 33%;
    min-width: auto;
  }
}
.brand-textbox.u-align--right, .brand-textbox.u-align--left, ucd-theme-brand-textbox.u-align--right, ucd-theme-brand-textbox..u-align--left {
  min-width: 100%;
}