IsWindowHovered() made change which should have no effect in master but fix result of IsWindowHovered(ImGuiHoveredFlags_ChildWindows) over multiple viewport in docking branch. (#2432)

imgui.cpp

@@ -6016,7 +6016,7 @@ bool ImGui::IsWindowHovered(ImGuiHoveredFlags flags)
         }
     }
 
-    if (!IsWindowContentHoverable(g.HoveredRootWindow, flags))
+    if (!IsWindowContentHoverable(g.HoveredWindow, flags))
         return false;
     if (!(flags & ImGuiHoveredFlags_AllowWhenBlockedByActiveItem))
         if (g.ActiveId != 0 && !g.ActiveIdAllowOverlap && g.ActiveId != g.HoveredWindow->MoveId)

imgui_demo.cpp

@@ -1594,6 +1594,7 @@ static void ShowDemoWindowWidgets()
             "IsWindowHovered(_AllowWhenBlockedByActiveItem) = %d\n"
             "IsWindowHovered(_ChildWindows) = %d\n"
             "IsWindowHovered(_ChildWindows|_RootWindow) = %d\n"
+            "IsWindowHovered(_ChildWindows|_AllowWhenBlockedByPopup) = %d\n"
             "IsWindowHovered(_RootWindow) = %d\n"
             "IsWindowHovered(_AnyWindow) = %d\n",
             ImGui::IsWindowHovered(),
@@ -1601,6 +1602,7 @@ static void ShowDemoWindowWidgets()
             ImGui::IsWindowHovered(ImGuiHoveredFlags_AllowWhenBlockedByActiveItem),
             ImGui::IsWindowHovered(ImGuiHoveredFlags_ChildWindows),
             ImGui::IsWindowHovered(ImGuiHoveredFlags_ChildWindows | ImGuiHoveredFlags_RootWindow),
+            ImGui::IsWindowHovered(ImGuiHoveredFlags_ChildWindows | ImGuiHoveredFlags_AllowWhenBlockedByPopup),
             ImGui::IsWindowHovered(ImGuiHoveredFlags_RootWindow),
             ImGui::IsWindowHovered(ImGuiHoveredFlags_AnyWindow));