Fixed issue #1297: First click on node may not trigger OnNodeClick

Author: joachimmarder

Source/VirtualTrees.BaseTree.pas

@@ -12436,6 +12436,7 @@ procedure TBaseVirtualTree.HandleMouseDown(var Message: TWMMouse; var HitInfo: T
     Winapi.Windows.SetFocus(Handle);
     // Repeat the hit test as an OnExit event might got triggered that could modify the tree.
     GetHitTestInfoAt(Message.XPos, Message.YPos, True, HitInfo, KeysToShiftState(Message.Keys));
+    FLastHitInfo := HitInfo; // See issue #1297
   end;
 
   if IsEmpty then