message: limit page numbers entered manually
  fixes a potential crash when setting currentPage to 0, numPages+1, etc.
diff: @@ -2493,7 +2493,8 @@ void MainWindow::buildWindowTransformEditor()
  ImGui::Text("page");
  ImGui::SameLine();
  ImGui::SetNextItemWidth(20.f);
  - ImGui::InputInt(paginateLabel.c_str(), &currentPage, 0);
  + if (ImGui::InputInt(paginateLabel.c_str(), &currentPage, 0))
  + currentPage = std::min(std::max(currentPage, 1), numPages);
  ImGui::SameLine();
  if (ImGui::ArrowButton("##nextPage", ImGuiDir_Right))
  currentPage = std::min(numPages, currentPage + 1);
  