Fixed build when ENABLE_CANVAS_TOOLTIP_USING_IMGUI is disabled
Fixed build when ENABLE_CANVAS_TOOLTIP_USING_IMGUI is disabled

prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r,prusa3d/Slic3r