Add appendToBody option to uiSelectConfig.

Author: cmlenz

src/common.js

@@ -95,7 +95,8 @@ var uis = angular.module('ui.select', [])
   closeOnSelect: true,
   generateId: function() {
     return latestId++;
-  }
+  },
+  appendToBody: false
 })
 
 // See Rename minErr and make it accessible from outside https://github.com/angular/angular.js/issues/6913

src/uiSelectDirective.js

@@ -370,7 +370,8 @@ uis.directive('uiSelect',
       });
 
       // Support for appending the select field to the body when its open
-      if (scope.$eval(attrs.appendToBody)) {
+      var appendToBody = scope.$eval(attrs.appendToBody);
+      if (appendToBody !== undefined ? appendToBody : uiSelectConfig.appendToBody) {
         scope.$watch('$select.open', function(isOpen) {
           if (isOpen) {
             positionDropdown();