Refactor EndFrame() code that process focusing window with left mouse button. This commit should be no-op.

imgui.cpp

@@ -2771,10 +2771,12 @@ void ImGui::EndFrame()
         g.CurrentWindow->Active = false;
     ImGui::End();
 
-    // Click to focus window and start moving (after we're done with all our widgets)
-    if (g.ActiveId == 0 && g.HoveredId == 0 && g.IO.MouseClicked[0])
+    if (g.ActiveId == 0 && g.HoveredId == 0)
+    {
+        if (!g.NavWindow || g.NavWindow->WasActive || !g.NavWindow->Active) // Unless we just made a popup appear
         {
-        if (!(g.NavWindow && !g.NavWindow->WasActive && g.NavWindow->Active)) // Unless we just made a popup appear
+            // Click to focus window and start moving (after we're done with all our widgets)
+            if (g.IO.MouseClicked[0])
             {
                 if (g.HoveredRootWindow != NULL)
                 {
@@ -2793,6 +2795,7 @@ void ImGui::EndFrame()
                 }
             }
         }
+    }
 
     // Sort the window list so that all child windows are after their parent
     // We cannot do that on FocusWindow() because childs may not exist yet