Prevent Thunderbird from trying to display large plain text attachments

I have a coworker who loves sending large plain-text tab-delimited data files by e-mail instead of our network share. The problem is that Thunderbird hangs while it renders all of that text into the message view window, making my inbox unhappy for minutes at a time.

Ideally, I'd like to disable viewing of text/plain attachments above a few K, but if necessary I'd be fine disabling viewing of all text attachments and just rely on an external viewer. There wasn't an immediately obvious way to do this in Options. Is there a way?

I'd be fine disabling viewing of all text attachments

Clear View -> Display Attachments Inline

Due to changes to the Thunderbird options dialog, Molly7244's solution does not work any longer.

Alternatively you can edit the Thunderbird configuration under menu Settings -> General -> Edit config and set mail.inline_attachment to false.