I did compile my vertex snap editor in 4.4 !
You can download it here, instructions on the wiki page 
https://wiki.unrealengine.com/'s_Vertex_Snap_Editor_Plugin#Plugin_Download
Let me know how it goes!
EDIT:
I just tested all functionality of my vertex snap plugin in 4.4
-different vertex shapes
-resizing
-snap
-snap to surface normal
-reset rotation
-
T key for instant translation
-
and also undo/redo of any number of vertex snapping!
It all worked!