Fix some more Fx 32 issues

Ref https://forums.zotero.org/discussion/37885/
Natural sorting of numbers ("1" < "2" < "10")

This needs testing to see if it has any other unwanted effects.

Closes Trac ticket 1031
Restore highlighting of collection row during drag on Windows
Fix Quick Copy drag to Chrome textareas on Windows

Possibly to other places as well (but not Notepad, which doesn't work
from Firefox or Chrome either)

Unfortunately this requires going back to 'copy' cursor feedback when
dragging, even when Shift is used. We can only choose one on Windows (as
far as I can tell), and we were previously using the unadorned 'move'.
Clarify comment for Windows drag-and-drop mess
Further Windows drag-and-drop comment rewriting
Fix intermittent source file deletion when dragging files in on Windows

(at least, if this is caused by what I think it was caused by)

https://forums.zotero.org/discussion/38486/
Merge branch '4.0' of https://github.com/zotero/zotero into newdev
Don't ignore initial punctuation when sorting
Also, change sorting sensitivity to "base"
Closes #514
Merge pull request #515 from aurimasv/sort-initP

Don't ignore initial punctuation when sorting
Another Fx 32 translation fix
Merge branch '4.0' of https://github.com/zotero/zotero into newdev
Add REMASTER working notes on the upcoming trauma