Hi Denis, that was exactly the problem! A little bit of stracing and replacing white.png in the current directory proved your hypothesis. Thx for being one step ahead of me :) It appears that the latest Ubuntu release (19.04) has updated to 0.4.8.2016. As far as I'm concerned, this ticket can be closed now. Cheers!
Toolbar icons are very tall, reducing available space for document
Checkstyle fails when IDE runs on JDK 1.7 and code is cross-compiled with JDK 1.8