Correct treemacs integration.

[Alexander-Miller]

Corrected (and tested) treemacs integration, as discussed in #4.

[tarsius]

Thanks.
"Merged" also see below:

[tarsius]

Unfortunately this pull-request asks for your master branch to be merged into ours. It is better to use a dedicated feature branch instead, as explained here. It is too late for this pull-request now, but the next time you open a pull-request (in any repository really), then please use a feature branch.

While you did use a feature branch, you did not give them maintainer push rights to it.

_{This is a canned response; it may not apply 100% in this case.}

[Alexander-Miller]

While you did use a feature branch, you did not give them maintainer push rights to it.

I open the PR, the box is checked. I come back to it the next day, it's unchecked. You might want to consider creating a new repository, I think this one is cursed.