Added a maxlength setting to the regular expression pattern field. (#17982)

src/Umbraco.Web.UI.Client/src/less/components/umb-group-builder.less

@@ -943,7 +943,7 @@ input.umb-group-builder__group-sort-value {
     .editor-description,
     .editor-validation-pattern {
         min-width: 100%;
-        min-height: 25px;
+        min-height: 60px;
         resize: none;
         box-sizing: border-box;
         border: none;

src/Umbraco.Web.UI.Client/src/views/common/infiniteeditors/propertysettings/propertysettings.html

@@ -125,6 +125,7 @@
                                       ng-model="model.property.validation.pattern"
                                       ng-change="vm.changeValidationPattern()"
                                       ng-if="vm.showValidationPattern"
+                                      maxlength="255"
                                       umb-auto-resize
                                       focus-when="{{vm.focusOnPatternField}}"
                                       ng-keypress="vm.submitOnEnter($event)">