gnome: edit_panel_cmd.c bound to F4 just like view with F3

src/screen.c

@@ -2198,6 +2198,7 @@ static key_map panel_keymap [] = {
     { '*',	  reverse_selection_cmd_panel },
     { XCTRL('r'), reread_cmd },
     { KEY_F(3),   view_panel_cmd },
+    { KEY_F(4),   edit_panel_cmd },
     { KEY_F(5),   copy_cmd },
     { KEY_F(6),   ren_cmd },
     { KEY_F(7),   mkdir_panel_cmd },