Related to this report in the German Forum:
http://www.simutrans-forum.de/forum/thread.php?threadid=6931 (http://www.simutrans-forum.de/forum/thread.php?threadid=6931)
This combination of menuconf.tab and menu.BarTools.pak worked in 111.0, but does not work in 111.1, 111.2.1 or 111.2.2. Narrowgauge menu-item and maglev menu-item does not show from 111.1 on. Designating a keyboard key to the narrowgauge menu-item does show the narrowgauge toolbar, so that toolbar is okay.
http://www.combuijs.nl/ftp/menu.BarTools.pak (http://www.combuijs.nl/ftp/menu.BarTools.pak)
Source for menu.BarTools.pak is available if necessary.
Combuijs
Saschapascal will reorganize the menu.pak and the menuconf.tab.
Iirc, toolbar icons are only shown if the toolbar is not empty. Starting a game without timeline shows the icons again.
Thank you very much Dwachs for investigating. I never would have thought of timeline influencing the toolbar menu.
Not sure I agree with this (toolbar is not empty, it only contains a "remove narrowgauge" button, which you won't see if you can't lay narrowgauge track, which in turn means you can't remove track if you can't lay track), but I'm very glad you found the cause. It saves me several evenings finding the cause of the disappearance!
Thanks again!!!