Please add ability to support Bootstrap input groups with the MultiSelect Dropdown. Below is code I attempted but the added plus sign is not appending to the end. I am trying to append an "add" button so the user can get a popup to add a new item to the MultiSelect dropdown list.
<div class="col-12 input-group">
<SfMultiSelect ID="RolePicker" FloatLabelType="@FloatLabelType.Auto" TValue="string[]" Mode="@VisualMode.CheckBox" Placeholder="Roles can submit form"
DataSource="@Roles" ShowSelectAll="true" CssClass="form-control"
EnableSelectionOrder="true" FilterBarPlaceholder="Search roles" EnableGroupCheckBox="true" PopupHeight="350px">
<MultiSelectFieldSettings GroupBy="Category" Value="Name"></MultiSelectFieldSettings>
</SfMultiSelect>
<div class="input-group-append">
<span class="input-group-text">+</span>
</div>
</div>