Enable GHNS for Window Switcher

Thanks to the new category on kde-look.org we can now show the GHNS
button inside the KCM.

BUG: 297636
FIXED-IN: 4.9.3
REVIEW: 106991

kcmkwin/kwintabbox/kwinswitcher.knsrc

@@ -1,5 +1,5 @@
 [KNewStuff3]
-Categories=KWin Window Switcher
+Categories=KWin Switching Layouts
 StandardResource=tmp
 InstallationCommand=plasmapkg -t windowswitcher -i %f
 UninstallCommand=plasmapkg -t windowswitcher -r %f

kcmkwin/kwintabbox/main.cpp

@@ -110,9 +110,6 @@ KWinTabBoxConfig::KWinTabBoxConfig(QWidget* parent, const QVariantList& args)
         ui[i]->effectConfigButton->setIcon(KIcon("view-preview"));
         ui[i]->ghns->setIcon(KIcon("get-hot-new-stuff"));
 
-        // TODO: remove once the category has been created.
-        ui[i]->ghns->setVisible(false);
-
         connect(ui[i]->highlightWindowCheck, SIGNAL(clicked(bool)), SLOT(changed()));
         connect(ui[i]->showOutlineCheck, SIGNAL(clicked(bool)), SLOT(changed()));
         connect(ui[i]->showTabBox, SIGNAL(clicked(bool)), SLOT(tabBoxToggled(bool)));