IDEA-169661 Git branches popup appears with its right part out of visible screen area

platform/platform-impl/src/com/intellij/ui/popup/WizardPopup.java

@@ -309,6 +309,9 @@ public abstract class WizardPopup extends AbstractPopup implements ActionListene
 
     @Override
     public Dimension getPreferredSize() {
+      if (isPreferredSizeSet()) {
+        return super.getPreferredSize();
+      }
       final Component focusOwner = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
       Point p = null;
       if (focusOwner != null && focusOwner.isShowing()) {