Transparency of element settings window slows down the application.

The window to change the settings for an element is always displayed with a transparency. It seems to me that this transparency is using a lot of resources. The more elements are contained in my drafts, the more time it takes for the window to reduce its transparency to zero when I want to use it. This is even worse when the window is overlapping my draft.

I don’t see the advantage of a transparency for this window, especially as it is slowing down me. Is there a possibility to disable the transparency of this window ?