PR #6769 added the boolean BrowseRecursiveFollowLinks options, but while
it's saved as a boolean, it's read as an integer causing this error:
```
Options::readFromFile / Error code 5 while reading values from "/home/sgotti/.config/RawTherapee/options":
Key file contains key “BrowseRecursiveFollowLinks” in group “File Browser” which has a value that cannot be interpreted.
```
c2a57359fe