Summary:
Fixes T2272
If the label is too long, the unread icons will now ellipsis truncate the
text correctly instead of being pushed off of the side.
I made the max-width of the sidebar 17px wider to allow for Karim's french
"Inbox" translation.
Fixes T2266
Added some more protection to places where filenames could be blank when
downloading.
This was partially fixed by Rob's D1685
Fixes T2258
You can now finish selecting a participant by pressing `space`, but only
when the participant looks like an email address.
When you do this we directly add the email address to the chip instead of
looking up a contact. This allows you to send just to the email instead of
adding a potentially erroneous name into the input field
Test Plan: edgehill --test
Reviewers: bengotow
Reviewed By: bengotow
Maniphest Tasks: T2272, T2266, T2258
Differential Revision: https://phab.nylas.com/D1729
