This came up in D3364 when we manually added cursor:pointer to a.sendButton.
Followed @palys-swm suggestion (https://phabricator.ashoat.com/D3364#90810) and applied this style "globally."
Note: I am not planning on going through the codebase right now and cutting every extraneous cursor:pointer applied to an <a> or <button>. I think doing so would be fine, but I don't want to check every single instance right now to ensure that there are no regressions. I think it's fine to leave them in even if they may be redundant.