Add empty hrefs

Empty hrefs allow IE10 to properly focus the elements.

public/templates/work_packages.list.details.html

@@ -2,24 +2,24 @@
   <ul class="tabrow">
     <li ui-sref="work-packages.list.details.overview({})"
         ui-sref-active="selected">
-      <a href ng-bind="I18n.t('js.work_packages.tabs.overview')"/>
+      <a href="" ng-bind="I18n.t('js.work_packages.tabs.overview')"/>
     </li>
     <li ui-sref="work-packages.list.details.activity({})"
         ui-sref-active="selected">
-      <a href ng-bind="I18n.t('js.work_packages.tabs.activity')"/>
+      <a href="" ng-bind="I18n.t('js.work_packages.tabs.activity')"/>
     </li>
     <li ui-sref="work-packages.list.details.relations({})"
         ui-sref-active="selected">
-      <a href ng-bind="I18n.t('js.work_packages.tabs.relations')"/>
+      <a href="" ng-bind="I18n.t('js.work_packages.tabs.relations')"/>
     </li>
     <li ng-if="canViewWorkPackageWatchers()"
         ui-sref="work-packages.list.details.watchers({})"
         ui-sref-active="selected">
-      <a href ng-bind="I18n.t('js.work_packages.tabs.watchers')"/>
+      <a href="" ng-bind="I18n.t('js.work_packages.tabs.watchers')"/>
     </li>
     <li ui-sref="work-packages.list.details.attachments({})"
         ui-sref-active="selected">
-      <a href ng-bind="I18n.t('js.work_packages.tabs.attachments')"/>
+      <a href="" ng-bind="I18n.t('js.work_packages.tabs.attachments')"/>
     </li>
   </ul>
 </div>