Make it clear the user should search for the age

Author: tkrotoff

examples/demo.html

@@ -73,8 +73,8 @@ <h3>Bootstrap theme</h3>
 
   <h3>Select2 theme</h3>
   <p>Selected: {{person.selected}}</p>
-  <ui-select ng-model="person.selected" theme="select2" ng-disabled="disabled" style="width: 300px;">
-    <match placeholder="Select a person in the list or search his age...">{{$select.selected.name}}</match>
+  <ui-select ng-model="person.selected" theme="select2" ng-disabled="disabled" style="min-width: 300px;">
+    <match placeholder="Select a person in the list or search his *age*...">{{$select.selected.name}}</match>
     <choices repeat="person in people | filter: {age: $select.search}">
       <div ng-bind-html="person.name | highlight: $select.search"></div>
       <small>