Handle resizing via PseudoLayout

This fixes the scenario where we just get a grey view when opening a link in a
tab from DuckDuckGo.

qutebrowser/browser/webengine/webview.py

@@ -73,11 +73,6 @@ class WebEngineView(QWebEngineView):
     def shutdown(self):
         self.page().shutdown()
 
-    def resizeEvent(self, _event):
-        widget = self.render_widget()
-        if widget is not None:
-            widget.setGeometry(self.rect())
-
     def createWindow(self, wintype):
         """Called by Qt when a page wants to create a new window.
 

qutebrowser/misc/miscwidgets.py

@@ -281,6 +281,20 @@ class PseudoLayout(QLayout):
     def itemAt(self, _pos):
         return None
 
+    def widget(self):
+        return self.parent().render_widget()
+
+    def setGeometry(self, rect):
+        widget = self.widget()
+        if widget is not None:
+            widget.setGeometry(rect)
+
+    def sizeHint(self):
+        widget = self.widget()
+        if widget is not None:
+            return widget.sizeHint()
+        return QSize()
+
 
 class FullscreenNotification(QLabel):