Peazip 6.6 draws an undesired "Peazip" button in the middle of the GUI

0.4.9-RC-35-g3eb03ef is affected

We are not talking about all the other GUI glitches, we are just talking about the undesired "Peazip"-button right in the middle of the window. It moves with the window when I drag the window. And its position is reproducibly the same when I reopen the app.

newer Peazip 6.6 (that was added to rapps DB 2018-06-13) is affected, but older Peazip 6.0 that we had in rapps before, was not affected, I tested with exact same ros build.

049RC35_Peazip6_6__aStrangeButton.png
049RC35_Peazip6_6.log

049RC35_peazip6_0_ok.png
2k3_Peazip6_6.png