Inconsistent css with fieldset / uikit

[Jehfen]

Two issues:

• Fieldset colors aren't cascading to fields (indicated in green)
• Fields aren't correctly set to the remaining height of the row, resulting in white background instead of the chosen uikit color of the field (indicated in red)

Both issues could be solved by applying:

.InputfieldFieldset>.InputfieldContent>.Inputfields {
  background: inherit;
}
.InputfieldFieldset>.InputfieldContent>.Inputfields .Inputfield {
  background: inherit;
}