Summary:
Ref T2852. It's a little tricky to figure out Asana workspace IDs right now. If the viewer has a linked account, just pull their workspaces and show them which IDs are available.
(In theory, we could use a `<select>`, but it would have more edge cases; this seems like a pretty solid fix.)
Test Plan: {F49938}
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T2852
Differential Revision: https://secure.phabricator.com/D6437
2b37911097