fix logic for amoutn 1

Author: jonassorgenfrei

NodeGraphQt/custom_widgets/properties_bin/node_property_widgets.py

@@ -803,12 +803,12 @@ def add_node(self, node):
         if itm_find:
             self._prop_list.removeRow(itm_find[0].row())
 
+        self._prop_list.insertRow(0)
         rows = self._prop_list.rowCount() - 1
-        if rows >= (self.limit()-1):
+        
+        if rows >= (self.limit()):
             # remove last row
-            self._prop_list.removeRow(rows - 1)
-
-        self._prop_list.insertRow(0)
+            self._prop_list.removeRow(rows)
 
         prop_widget = self.create_property_editor(node=node)
         prop_widget.property_closed.connect(self.__on_prop_close)