always trust KWin for setting struts

--when kwin is running then we should always
trust it in order to provide correct struts.
That applies also under x11 where other wms
might fail.

BUG:447595
FIXEX-IN:0.10.7

app/view/visibilitymanager.cpp

@@ -433,22 +433,17 @@ bool VisibilityManager::canSetStrut() const
         return false;
     }
 
-    if (!KWindowSystem::isPlatformX11() || !m_wm->isKWinRunning()/*alternative de*/) {
+    if (!KWindowSystem::isPlatformX11() || m_wm->isKWinRunning()) {
+        // we always trust wayland and kwin to provide proper struts
         return true;
     }
 
-    // read the wm name, need to do this every time which means a roundtrip unfortunately
-    // but WM might have changed
-    //NETRootInfo rootInfo(QX11Info::connection(), NET::Supported | NET::SupportingWMCheck);
-    //if (qstricmp(rootInfo.wmName(), "KWin") == 0) {
-    // KWin since 5.7 can handle this fine, so only exclude for other window managers
-    //return true;
-    //}
-
     if (qGuiApp->screens().count() < 2) {
         return true;
     }
 
+    /*Alternative DEs*/
+
     const QRect thisScreen = m_latteView->screen()->geometry();
 
     // Extended struts against a screen edge near to another screen are really harmful, so windows maximized under the panel is a lesser pain