I think this is impossible to add this vte patch to Ubuntu 14.04 LTS (only to future releases). Only one chance to fix mouse scroll in this release is patch to mate-terminal. If you don't add patch to mate-terminal then Ubuntu stay with incorrect scroll for all long LTS period (about 5 years as I remember).
I waiting for this fix on Ubuntu 12.04 LTS and when I go to new 14.04 LTS this bug still there.
I think this is impossible to add this vte patch to Ubuntu 14.04 LTS (only to future releases). Only one chance to fix mouse scroll in this release is patch to mate-terminal. If you don't add patch to mate-terminal then Ubuntu stay with incorrect scroll for all long LTS period (about 5 years as I remember).
I waiting for this fix on Ubuntu 12.04 LTS and when I go to new 14.04 LTS this bug still there.