fixed infinite cycle by removing getPattern function in favor of field.regex

static/directives/manual-trigger-build-dialog.html

@@ -45,7 +45,7 @@
                     <!-- Regex -->
                     <div ng-switch-when="regex">
                       <input type="text" class="form-control" ng-model="parameters[field.name]"
-                             ng-pattern="getPattern(field)"
+                             ng-pattern="field.regex"
                              placeholder="{{ field.placeholder }}"
                              ng-name="field.name"
                              id="{{ field.name }}"