[Fix] Remove Scenarios from Objects (#159)

Fixes #155

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#159

templates/modals/objects/generic_set_scenario_modal.html

@@ -18,6 +18,7 @@
                     <select id="scenario-select" name="selected-scenarios" data-actions-box='true' class="form-control"
                             multiple data-width='100%'>
                         <option disabled>Select Scenarios</option>
+                        <option value="" hidden></option>
                     </select>
                 </form>
             </div>
@@ -65,7 +66,7 @@
             $('#set_scenario_modal_form_submit').on('click', function (e) {
                 e.preventDefault();
                 if ($('#scenario-select').val().length == 0) {
-                    $('#scenario-select').val([''])
+                    $('#scenario-select').val("")
                 }
                 $('#set_scenario_modal_form').submit();
             });