Add acceskey that toggles details view.

frontend/app/templates/work_packages.list.html

@@ -38,6 +38,7 @@
               {{ getActivationActionLabel(isDetailsViewActive()) + ' ' + I18n.t('js.button_list_view') }}
             </label>
             <button id="work-packages-list-view-button"
+                    accesskey="{{ !isDetailsViewActive() ? '' : '8' }}" 
                     class="button"
                     title="{{ getActivationActionLabel(isDetailsViewActive()) + ' ' + I18n.t('js.button_list_view') }}"
                     ng-click="closeDetailsView()"
@@ -49,8 +50,10 @@
             <label for="work-packages-details-view-button" class="hidden-for-sighted">
               {{ getActivationActionLabel(!isDetailsViewActive()) + ' ' + I18n.t('js.button_details_view') }}
             </label>
+            <button class="hide" 
+                    ng-click="openOverviewTab()" 
+                    accesskey="{{ isDetailsViewActive() ? '' : '8' }}"></button>
             <button id="work-packages-details-view-button"
-                    accesskey="8"
                     class="button"
                     title="{{ getActivationActionLabel(!isDetailsViewActive()) + ' ' + I18n.t('js.button_details_view') }}"
                     ng-class="{ active: isDetailsViewActive() }"

frontend/app/work_packages/controllers/work-packages-list-controller.js

@@ -270,6 +270,15 @@ module.exports = function($scope, $rootScope, $state, $location, latestTab,
       });
   };
 
+  $scope.openOverviewTab = function() {
+    $scope.settingUpPage = $state.go(
+      'work-packages.list.details.overview',
+      {
+        workPackageId: $scope.preselectedWorkPackageId,
+        'query_props': $location.search()['query_props']
+      });
+  };
+
   $scope.closeDetailsView = function() {
     // can't use query_props in $state.go since it's not specified
     // in the config. if I put it into config, a reload will be triggered