… but… never one to be beaten 
(although pathetically complicated in relation to the description originally given 
)…
- Select all the notes
- Use the Knife tool to trim the end of the notes diagonally (yes, I know )
- Select the newly-trimmed notes, and copy them to the clipboard.
- Transport menu>Locate Selection End
- Paste
- (making sure that it is just the newly-pasted notes that are selected)…
- MIDI menu>Functions>Mirror
- MIDI menu>Functions>Reverse
- Set Snap mode to “Events”
10 ) Drag to the left, until the selection butts agains the original( trimmed) notes. - (optional) Select the newly-pasted notes and ctrl/cmd the knife tool (making sure that the knife passes through all selected notes), at the position that is the same as the end of the original notes before you had trimmed them .
(Try it… it surprised me! 
)
EDIT…
I think the following modification to the above works just as well…
- thru 3)… same as above
- Select just the note that now ends the earliest
- Paste
- (making sure that it is just the newly-pasted notes that are selected)…
- MIDI menu>Functions>Mirror
- MIDI menu>Functions>Reverse
- (optional) Select the newly-pasted notes and ctrl/cmd the knife tool (making sure that the knife passes through all selected notes), at the position that is the same as the end of the original notes before you had trimmed them .