Issues related to opening Extensions.cfg file in Object Viewer

Hi,

In OpenBVE version 1.7.3.1 and also in the latest Nightly build (2021.04.22.), I found a strange bug in Object Viewer.
I opened the Extensions.cfg file of a train (in Object Viewer), it loaded successfully without problems. After that, I disappeared the loaded object by pressing the "delete" button / key, and that was okay, too. However, when I then tried to load a .b3d / .animated file by pressing the "F7" key, not only the selected .b3d / .animated file was loaded. Unfortunately, at the same time, also the Extensions.cfg file was loaded again, which I loaded and then deleted ("F7" and "delete" key) before opening the .b3d / .animated file. This is the bug. Of course, the loaded objects will disappear normally by pressing the "delete" key.
Could you solve this problem, please?

Thanks,
Andrew

I encountered this issue in v1.7.3.1.
However, the latest nightly build do not have this issue.
Probably fixed by this pull request.

I was wrong.
This issue does not occur with v1.8.0.1.