rename now-obsolete ImGuiCol_ModalWindowDarkening

...to ImGuiCol_ModalWindowDimBg

debugging/glow-extras/debugging/imgui-util.cc

@@ -106,7 +106,7 @@ void glow::debugging::applyGlowImguiTheme(bool darkMode)
         colors[ImGuiCol_PlotHistogram] = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
         colors[ImGuiCol_PlotHistogramHovered] = ImVec4(1.00f, 0.60f, 0.00f, 1.00f);
         colors[ImGuiCol_TextSelectedBg] = ImVec4(0.26f, 0.59f, 0.98f, 0.35f);
-        colors[ImGuiCol_ModalWindowDarkening] = ImVec4(0.20f, 0.20f, 0.20f, 0.35f);
+        colors[ImGuiCol_ModalWindowDimBg] = ImVec4(0.20f, 0.20f, 0.20f, 0.35f);
         colors[ImGuiCol_DragDropTarget] = ImVec4(0.26f, 0.59f, 0.98f, 0.95f);
         colors[ImGuiCol_NavHighlight] = colors[ImGuiCol_HeaderHovered];
         colors[ImGuiCol_NavWindowingHighlight] = ImVec4(0.70f, 0.70f, 0.70f, 0.70f);