md5.sqlite path column uses both / and \ as path separator inconsistently

[typhoon71]

Not really a time stopping bug, and maybe nobody will have an issue with it... but!

I noticed the md5 database can have duplicate entries for the same image, as same md5 and same path.

This happens when because the path gets writtens with / or \, depending on where the download is initiated in Grabber.

Basically:

• have some search monitored...
• then download its "clone" from the downloads tab
• (you can also use the tool that adds md5 of pics from a folder)
• the md5 db will show 2 row for each image, one with \ and one with /

It's only the path column in the db that's affected, the image is properly skipped - as it's recognized.