message: Windows with MenuBar have a larger minimum height to avoid artefacts (I fixed most of the vertical/horizontal artefacts, but the ones in rounded corners were too hard to fix).
diff: @@ -4014,7 +4014,10 @@ static ImVec2 CalcSizeFullWithConstraint(ImGuiWindow* window, ImVec2 new_size)
  }
  }
  if (!(window->Flags & (ImGuiWindowFlags_ChildWindow | ImGuiWindowFlags_AlwaysAutoResize)))
  + {
  new_size = ImMax(new_size, g.Style.WindowMinSize);
  + new_size.y = ImMax(new_size.y, window->TitleBarHeight() + window->MenuBarHeight() + ImMax(0.0f, g.Style.WindowRounding - 1.0f)); // Reduce artifacts with very small windows
  + }
  return new_size;
  }
  