Single-quotes are erroneously backslash-escaped in path names in the config

[johnnovak]

Repro steps

1. Add a directory hard drive with single-quotes in the path name:

2. So far so good:

3. Save it as a new config, then reload it. Ooops! There's a backslash now before the single-quote, rendering the path invalid:

4. Verified in the config, it's a config writing issue. If I remove the backslash from the path in the config manually, it works again.

[johnnovak]

@tonioni Confirming the fix works as expected in 5.2.0 b2. Thanks!