Fix case where widgets may get hidden by qt, thanks @seandpagnier

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77926 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/qt/window.cpp

@@ -831,6 +831,13 @@ void wxWindowQt::DoSetSize(int x, int y, int width, int height, int sizeFlags )
         height = h;
 
     DoMoveWindow( x, y, width, height );
+
+    // An annoying feature of Qt
+    // if a control is created with size of zero, it is set as hidden by qt
+    // if it is then resized, in some cases it remains hidden, so it
+    // needs to be shown here
+    if (!m_qtWindow->isVisible() && IsShown())
+        m_qtWindow->show();
 }