Add Bootstrap `input-group` to demos

[adamculpepper]

<div class="float-label input-group">
	<select id="record-type" class="form-select">
		<option value="1">Option 1</option>
		<option value="2">Option 2</option>
		<option value="3">Option 3</option>
	</select>
	<label for="record-type">Insurance Company</label>
	<button class="btn btn-outline-secondary" type="button">Add Admin</button>
</div>