Docking: Fixed dragging docked window with _NoMove flag (#2325)

imgui.cpp

@@ -5925,6 +5925,7 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
             // Docking: Dragging a dockable window (or any of its child) turns it into a drag and drop source.
             // We need to do this _before_ we overwrite window->DC.LastItemId below because BeginAsDockableDragDropSource() also overwrites it.
             if ((g.ActiveId == window->MoveId) && ((g.IO.ConfigDockingWithShift && g.IO.KeyShift) || (!g.IO.ConfigDockingWithShift)))
+                if ((window->Flags & ImGuiWindowFlags_NoMove) == 0)
                     if ((window->RootWindow->Flags & (ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoDocking)) == 0)
                         BeginAsDockableDragDropSource(window);