Modal: fixed non-child window stacked over a modal losing its hoverabilty/focusability (#615, #604)

imgui.cpp

@@ -2085,7 +2085,10 @@ void ImGui::NewFrame()
     if (ImGuiWindow* modal_window = GetFrontMostModalRootWindow())
     {
         g.ModalWindowDarkeningRatio = ImMin(g.ModalWindowDarkeningRatio + g.IO.DeltaTime * 6.0f, 1.0f);
-        if (g.HoveredRootWindow != modal_window)
+        ImGuiWindow* window = g.HoveredRootWindow;
+        while (window && window != modal_window)
+            window = window->ParentWindow;
+        if (!window)
             g.HoveredRootWindow = g.HoveredWindow = NULL;
     }
     else

imgui_demo.cpp

@@ -1244,6 +1244,9 @@ void ImGui::ShowTestWindow(bool* p_open)
                 ImGui::Text("All those beautiful files will be deleted.\nThis operation cannot be undone!\n\n");
                 ImGui::Separator();
 
+                //static int dummy_i = 0;
+                //ImGui::Combo("Combo", &dummy_i, "Delete\0Delete harder\0");
+
                 static bool dont_ask_me_next_time = false;
                 ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(0,0));
                 ImGui::Checkbox("Don't ask me next time", &dont_ask_me_next_time);