Popups: Revert aca23fd3f0 (Oct 20, 2017). Because 1) I can't seem to find a default. 2) The if is definitively faulty and would have been all true. 3) It looks like possibly the following commit 6ab737a4bb could have made this unnecessary. Not absolutly certain. (~#439)

imgui.cpp

@@ -3737,8 +3737,8 @@ void ImGui::OpenPopupEx(ImGuiID id, bool reopen_existing)
 
         // When reopening a popup we first refocus its parent, otherwise if its parent is itself a popup it would get closed by CloseInactivePopups().
         // This is equivalent to what ClosePopupToLevel() does.
-        if (g.OpenPopupStack[current_stack_size].PopupId == id)
-            FocusWindow(parent_window);
+        //if (g.OpenPopupStack[current_stack_size].PopupId == id)
+        //    FocusWindow(parent_window);
     }
 }