Toggling margin with progress

There is snippet: DHTMLX Snippet Tool

Look at the bottom of layout - there is margin like on each another side of layout.
Click on “progress show” button, and now that margin dissapeared.
That margin is only when progress is hidden.
There is effect that elements are shifting that is bad for user experience.

Thank you for your report.
The problem was confirmed. We’ll try to fix it in one of the future updates.
I’ll inform you about any progress on this task,

Hello @Przemyslaw_Niedziela.

We have fixed your reported problem in the latest dhx.Suite update (v8.1.0).
You can check it in your original snippet.
Please, download the latest available dhx.Suite build from your client’s area to get this fix.
Thank you for your report.