Make Multi URL Picker mandatory validation work clientside

src/Umbraco.Web.UI.Client/src/views/propertyeditors/multiurlpicker/multiurlpicker.controller.js

@@ -134,6 +134,12 @@ function multiUrlPickerController($scope, angularHelper, localizationService, en
             .then(function (data) {
                 vm.labels.general_recycleBin = data[0];
             });
+
+        // if the property is mandatory, set the minCount config to 1 (unless of course it is set to something already),
+        // that way the minCount/maxCount validation handles the mandatory as well
+        if ($scope.model.validation && $scope.model.validation.mandatory && !$scope.model.config.minNumber) {
+            $scope.model.config.minNumber = 1;
+        }
     }
 
     init();