userhandler/templates/modal/user_edit.html

<div class="modal" id="modal_edit_user" xmlns="http://www.w3.org/1999/html">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                    <span aria-hidden="true">×</span></button>
                <h4 class="modal-title">Edit User</h4>
            </div>
            <form id="formEditUser" action=""
                  class="form-horizontal"
                  method="post" enctype="multipart/form-data">
                {% csrf_token %}
                <input type="hidden"  id="projects_old" name="projects_old" value="asdasd">
                <div class="modal-body" id="modal_edit_user_body">
                    {% comment %}<div class="form-group">
                        <label for="username_edit" class="col-sm-3 control-label">Username *</label>
                        <div class="col-sm-6">
                            <input class="form-control" id="username_edit" name="username"
                                   placeholder="Username" required>
                        </div>
                    </div>{% endcomment %}
                    <div class="form-group">
                        <label for="password" class="col-sm-3 control-label">New Password</label>
                        <div class="col-sm-6">
                           <input class="form-control" id="edit_password" name="password" type="password"
                                   placeholder="Password">
                        </div>
                    </div>
                    <div class="form-group">
                        <label for=projects" class="col-sm-3 control-label">Default project *</label>
                        <div class="col-sm-6">
                            <select required id="default_project_edit" class="js-example-basic form-control" name="default_project">
                            </select>
                        </div>
                    </div>
                    <div class="form-group">
                        <label for=projects" class="col-sm-3 control-label">Projects *</label>
                        <div class="col-sm-6">
                            <select required id="projects_edit" class="js-example-basic-multiple form-control" name="projects"
                            multiple="multiple">
                            </select>
                        </div>
                    </div>


                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-default pull-left" data-dismiss="modal">Cancel</button>
                    <button class="btn btn-primary"
                            data-loading-text="<i class='fa fa-circle-o-notch fa-spin'></i> Editing..."
                            id="create_edit_user">Apply
                    </button>

                </div>
            </form>
        </div>
        <!-- /.modal-content -->
    </div>
    <!-- /.modal-dialog -->
</div>