ChangeScreen: Show tooltip on assignee link

Change-Id: Ibae9a8f4bcb4b723227465139f6e8879ac5f679a
Signed-off-by: Edwin Kempin <ekempin@google.com>
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/change/Assignee.ui.xml b/gerrit-gwtui/src/main/java/com/google/gerrit/client/change/Assignee.ui.xml
index 965ab2c..cf9eb5f 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/change/Assignee.ui.xml
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/change/Assignee.ui.xml
@@ -39,7 +39,8 @@
   </ui:style>
   <g:HTMLPanel>
     <div>
-      <u:InlineHyperlink ui:field='assigneeLink'/>
+      <u:InlineHyperlink ui:field='assigneeLink'
+          title='Search for changes assigned to this user'/>
       <g:Image ui:field='editAssigneeIcon'
           resource='{ico.editUser}'
           styleName='{style.editAssignee}'