Fix input-sm/input-lg not affecting field height

Override PicoCSS fixed height with height: auto so that padding and
font-size from .input-sm/.input-lg properly size the input fields.

Author: Amaury

css/mu.component.forms.css

@@ -4,10 +4,12 @@
 
 /* Sizes */
 input.input-sm, textarea.input-sm, select.input-sm {
+	height: auto;
 	padding: 0.375rem 0.625rem;
 	font-size: 0.8125rem;
 }
 input.input-lg, textarea.input-lg, select.input-lg {
+	height: auto;
 	padding: 0.75rem 1rem;
 	font-size: 1.125rem;
 }