Allow Maniphest task titles to wrap

Summary:
Long task titles currently break the task list in icky ways, let them
wrap instead. We probably need some shorten() / word break action here
eventually since I can still type "MMMMMMMMMMMMMMMMMMMMMMMMMM" (etc) to break
the layout but this covers non-prankster use cases.

Test Plan:
Created a task with an exceptionally long title, viewed it in the
task list, it wrapped reasonably and didn't ruin everything.

Differential Revision: 40
Reviewed By: aran
Reviewers: fratrik, aran
CC: epriestley, aran