fix details pane tooltip for version missing

public/templates/work_packages/tabs/overview.html

@@ -21,8 +21,8 @@
                                          work-package="workPackage">
           </span>
           <span ng-switch-when="version">
-            <a ng-if="propertyData.value.viewable" ng-href="{{propertyData.value.href}}">{{propertyData.value.title}}</a>
-            <span ng-if="!propertyData.value.viewable">{{propertyData.value.title}}</span>
+            <a ng-if="propertyData.value.viewable" title="{{propertyData.value.title}}" ng-href="{{propertyData.value.href}}">{{propertyData.value.title}}</a>
+            <span ng-if="!propertyData.value.viewable" title="{{propertyData.value.title}}">{{propertyData.value.title}}</span>
           </span>
           <span ng-switch-when="category">{{ propertyData.value.props.name }}</span>
           <span ng-switch-default