Optimize _add_column

gui.py

@@ -622,6 +622,8 @@ class ChannelList:
         width_template: str | None = None,
     ):
         table = self._table
+        # NOTE: we don't do this for the icon column
+        if cid != "#0":
             # we need to save the column settings and headings before modifying the columns...
             columns: tuple[str, ...] = table.cget("columns") or ()
             column_settings: dict[str, tuple[str, tk._Anchor, int, int]] = {}
@@ -633,8 +635,7 @@ class ChannelList:
                 column_settings[s_cid] = (
                     s_heading["text"], s_heading["anchor"], s_column["width"], s_column["minwidth"]
                 )
-        # ..., then add the column, but ensure we're not adding the icons column...
-        if cid != "#0":
+            # ..., then add the column
             table.config(columns=columns + (cid,))
             # ..., and then restore column settings and headings afterwards
             for s_cid, (s_name, s_anchor, s_width, s_minwidth) in column_settings.items():