x11 fixes for invalid windows

--when a window is stacked back to its parent window
for example the firefox case (dragging a tab to create
a new firefox window and redrag it afterwards to the
main window) the wm::windows array had inconsistent
window records.
--This is fixed and also any X11 transient changed signals
are not blocked for windowChanged signals

app/wm/tracker/windowstracker.cpp

@@ -797,12 +797,12 @@ void Windows::updateHints(Latte::View *view)
     //! PASS 2
     if (foundActiveInCurScreen && !foundActiveTouchInCurScreen) {
         //! Second Pass to track also Child windows if needed
-        /*qDebug() << "Windows Array...";
-        for (const auto &winfo : m_windows) {
-            qDebug() << " - " << winfo.wid() << " - " << winfo.display() << " parent : " << winfo.parentId();
-        }
-        qDebug() << " - - - - - ";
-        */
+
+        //qDebug() << "Windows Array...";
+        //for (const auto &winfo : m_windows) {
+        //    qDebug() << " - " << winfo.wid() << " - " << winfo.isValid() << " - " << winfo.display() << " - " << winfo.geometry() << " parent : " << winfo.parentId();
+        //}
+        //qDebug() << " - - - - - ";
 
         WindowInfoWrap activeInfo = m_windows[activeWinId];
         WindowId mainWindowId = activeInfo.isChildWindow() ? activeInfo.parentId() : activeWinId;

app/wm/waylandinterface.cpp

@@ -453,7 +453,7 @@ WindowInfoWrap WaylandInterface::requestInfo(WindowId wid) const
             winfoWrap.setActivities(QStringList());
         }
     } else {
-        return {};
+        winfoWrap.setIsValid(false);
     }
 
     return winfoWrap;

app/wm/xwindowinterface.cpp

@@ -321,7 +321,9 @@ WindowInfoWrap XWindowInterface::requestInfo(WindowId wid) const
 
     WindowInfoWrap winfoWrap;
 
-    if (isValidWindow(winfo) && !isPlasmaDesktop) {
+    if (!winfo.valid()) {
+        winfoWrap.setIsValid(false);
+    } else if (isValidWindow(winfo) && !isPlasmaDesktop) {
         winfoWrap.setIsValid(true);
         winfoWrap.setWid(wid);
         winfoWrap.setParentId(winfo.transientFor());
@@ -645,7 +647,7 @@ void XWindowInterface::windowChangedProxy(WId wid, NET::Properties prop1, NET::P
     //! ignore when the user presses a key, or a window is sending X events etc.
     //! without needing to (e.g. Firefox, https://bugzilla.mozilla.org/show_bug.cgi?id=1389953)
     //! NET::WM2UserTime, NET::WM2IconPixmap etc....
-    if (prop1 == 0 && !(prop2 & NET::WM2Activities)) {
+    if (prop1 == 0 && !(prop2 & (NET::WM2Activities | NET::WM2TransientFor))) {
         return;
     }