One-wide form fields do not stack properly

[likuilin]

Forms with one-wide fields do not stack properly:

<form class="ui form">
  <div class="fields">
    <div class="one wide field">
      <label>one wide</label>
      <input type="text" value="one wide" />
    </div>
    <div class="two wide field">
      <label>two wide</label>
      <input type="text" value="two wide" />
    </div>
    <div class="three wide field">
      <label>three wide</label>
      <input type="text" value="three wide" />
    </div>
  </div>
</form>

This is because this CSS is missing the one-wide case:

Semantic-UI/src/definitions/collections/form.less

Lines 910 to 942 in 597843a

	/* Swap to full width on mobile */
	@media only screen and (max-width : @largestMobileScreen) {
	.ui.form:not(.unstackable) .two.fields:not(.unstackable) > .fields,
	.ui.form:not(.unstackable) .two.fields:not(.unstackable) > .field,
	.ui.form:not(.unstackable) .three.fields:not(.unstackable) > .fields,
	.ui.form:not(.unstackable) .three.fields:not(.unstackable) > .field,
	.ui.form:not(.unstackable) .four.fields:not(.unstackable) > .fields,
	.ui.form:not(.unstackable) .four.fields:not(.unstackable) > .field,
	.ui.form:not(.unstackable) .five.fields:not(.unstackable) > .fields,
	.ui.form:not(.unstackable) .five.fields:not(.unstackable) > .field,
	.ui.form:not(.unstackable) .fields:not(.unstackable) > .two.wide.field,
	.ui.form:not(.unstackable) .fields:not(.unstackable) > .three.wide.field,
	.ui.form:not(.unstackable) .fields:not(.unstackable) > .four.wide.field,
	.ui.form:not(.unstackable) .fields:not(.unstackable) > .five.wide.field,
	.ui.form:not(.unstackable) .fields:not(.unstackable) > .six.wide.field,
	.ui.form:not(.unstackable) .fields:not(.unstackable) > .seven.wide.field,
	.ui.form:not(.unstackable) .fields:not(.unstackable) > .eight.wide.field,
	.ui.form:not(.unstackable) .fields:not(.unstackable) > .nine.wide.field,
	.ui.form:not(.unstackable) .fields:not(.unstackable) > .ten.wide.field,
	.ui.form:not(.unstackable) .fields:not(.unstackable) > .eleven.wide.field,
	.ui.form:not(.unstackable) .fields:not(.unstackable) > .twelve.wide.field,
	.ui.form:not(.unstackable) .fields:not(.unstackable) > .thirteen.wide.field,
	.ui.form:not(.unstackable) .fields:not(.unstackable) > .fourteen.wide.field,
	.ui.form:not(.unstackable) .fields:not(.unstackable) > .fifteen.wide.field,
	.ui.form:not(.unstackable) .fields:not(.unstackable) > .sixteen.wide.field {
	width: @oneColumn !important;
	}
	.ui.form .fields {
	margin-bottom: 0em;
	}
	}

  .ui.form:not(.unstackable) .fields:not(.unstackable) > .one.wide.field,

Are one-wide fields supposed to stack on mobile through some other mechanism? If not, I think the above line should be added so that they behave like all the others.