How to overcome z-index of sidebar tabs?

[wolfgang]

Hi Everyone,

when using tiddlyDesktop it appears that no increase of the z-index
can overcome the overlay of sidebar tabs.

I tried for example here - where I use tabs in the main menu - by
adding a higher z-index to the ".tiddler .selected" definition (for
easy access, scroll the appearing configuration tiddler down and click
'tiddlyDesktopStyle'):

http://aid.tiddlyspot.com/

- whenever a MainMenu tab is opened and a tiddler moved above.

Any help would be highly appreciated.