To that extent, that could be a configurable option. The only trick is that you need to create/resize the X desktop to be able to fit all the windows, and if you resize a window, the windows would potentially have to be internally rearranged.
I have also observed this issue in the same VcxSrv version. Running Windows 7 Enterprise 6.1.7601
I was wondering about this. Seen also on Windows 10 x64 build 14905. Love using VcXsrv...