Bad greying out of outer paths (other paths with same prefix also match)

What steps will reproduce the problem?

1. Create three directories, e.g. Database, Site.Web and Site.WebAPI
2. Add one file to each and commit.
3. Go to Site directory, do "Git show log" and look at files in the commit

What is the expected output? What do you see instead?

Files on Database and Site.WebAPI should be greyed out. Instead, the file in Site.WebAPI isn't. It looks like the prefix is checked without the path separator.

What version of TortoiseGit and Git are you using? On what operating system?

TortoiseGit 2.5.0.0, git version 2.14.1.windows.1 on Microsoft Windows 8.1 [Version 6.3.9600]