Fix for annoying issue opening duplicate folders when rooted in user directory

[dixonte]

This is a change to my previous contribution for opening and selecting files in an already open folder window where possible.

I encountered an annoying issue wherein, if the folder exists inside the user's home folder (e.g. C:\Users<username>\Dropbox), then Windows will consider the path different to the actual path to the folder.

For example:

This PC > System (C:) > Users > (username) > Dropbox

vs

(User Full Name) > Dropbox

If the user has the latter folder window open and attempts to select an open image from ImageGlass, ImageGlass passes the file path to the API which returns the above logical path, which does not match an open folder window, leading to a duplicate folder window being opened.

To get around this, I modified the method so it first attempts to iterate open folder windows for a basic path match, before continuing with the old method in the case a match cannot be found.

[d2phap]

Thanks @dixonte !