Nav, Docking: Fix dimming on docked windows.

imgui.cpp

@@ -4828,10 +4828,6 @@ void ImGui::Render()
             AddDrawListToDrawData(&viewport->DrawDataBuilder.Layers[0], GetBackgroundDrawList(viewport));
     }
 
-    // Draw modal/window whitening backgrounds
-    if (first_render_of_frame)
-        RenderDimmedBackgrounds();
-
     // Add ImDrawList to render
     ImGuiWindow* windows_to_render_top_most[2];
     windows_to_render_top_most[0] = (g.NavWindowingTarget && !(g.NavWindowingTarget->Flags & ImGuiWindowFlags_NoBringToFrontOnFocus)) ? g.NavWindowingTarget->RootWindowDockTree : NULL;
@@ -4847,6 +4843,10 @@ void ImGui::Render()
         if (windows_to_render_top_most[n] && IsWindowActiveAndVisible(windows_to_render_top_most[n])) // NavWindowingTarget is always temporarily displayed as the top-most window
             AddRootWindowToDrawData(windows_to_render_top_most[n]);
 
+    // Draw modal/window whitening backgrounds
+    if (first_render_of_frame)
+        RenderDimmedBackgrounds();
+
     ImVec2 mouse_cursor_offset, mouse_cursor_size, mouse_cursor_uv[4];
     if (g.IO.MouseDrawCursor && g.MouseCursor != ImGuiMouseCursor_None)
         g.IO.Fonts->GetMouseCursorTexData(g.MouseCursor, &mouse_cursor_offset, &mouse_cursor_size, &mouse_cursor_uv[0], &mouse_cursor_uv[2]);