v2.12.0
Changed markdownRender to be passed plaintext MD. Forgot-to-render check is now done at send time rather than periodically. Made new HTML-to-text code also take a range. Test cases need updating.
Make Chrome button visibly disabled in Chrome
Fixed #188: Chrome+Gmail hotkey wasn't working. Changed addEventListener to grab event in capture phase. It's likely that Google added a capture keydown handler that broke the old handler.