Hi Mr. Yuri,
I installed the custom UI that addresses that issue. I believe it's the version "Dark Gray Theme (MoI 4.0 beta) - Custom UI Bar.zip" I had to install and uninstall and test to find the one that worked out of the various .zip files there. The order of installation is important as you need to read in the author (Cody's) description below his screen grabs.

http://moi3d.com/forum/messages.php?webtag=MOI&msg=9242.1

The nodeeditor I installed was Max Smirnov's latest build from his web site here:

http://moi.maxsm.net/nodeeditor/

Jason