Tables: Fixed stacked popups incorrectly accessing g.CurrentTable of parent-in-stack windows.

imgui.cpp

@@ -2931,6 +2931,7 @@ static void SetCurrentWindow(ImGuiWindow* window)
 {
     ImGuiContext& g = *GImGui;
     g.CurrentWindow = window;
+    g.CurrentTable = window ? window->DC.CurrentTable : NULL;
     if (window)
         g.FontSize = g.DrawListSharedData.FontSize = window->CalcFontSize();
 }