Enhancement: Browse to subtitles

[NemanSyed]

I'm new to this add-on and am thrilled it exists! My source subtitles are often in different folders that intentionally do not follow the current folder or ./subs ./subtitles naming convention so there's no conflict with the embedded subtitles in the current MKV. However it would be so very helpful to be able to browse to select an arbitrary subtitle file from any arbitrary disk. (If this feature exists, it's not obvious from the UI.) Thank you!