Please attach screenshots of the changed UIs.
You also have several places in your code that use tabs. We only use spaces for indentation.

This is looking better.
I didn't see code or screenshots for doing this to the comment dialog. Can you also show a screenshot of the review dialog with multiple comments in the draft?

Can you use CSS to right-align this within its parent?
I think I'd also like it if it said something like "This field uses Markdown" instead of just "Markdown Field".

Instead of using  to split this across lines, I think I'd prefer joining an array of strings:

$('.body-top').append([
    '<a class="markdown-info" ',
    '   href="..." ',
    '   target="_blank">...</a>'
    ].join(''));

Same here with string joins.

This line has trailing whitespace.

Same here with string joins.

Leave this blank line here.

Please put a space between if and (.

Please put a space between if and (.

Please put a space between if and (.

This should be indented two spaces, and have a space between the : and the value.

Leave this line here.

These look like they're indented 3 spaces instead of 4.

The strings should be indented 4 spaces in from the previous alignment.
It might be worth moving all the chained methods down and indent them only 4 spaces. Something like this:

$draftComment
    .find('pre.reviewtext')
    .inlineEditor('buttons')
    .append([
        '<a class="markdown-info" '
        ...
    ]);



You also need to add spaces at the ends of these strings, because the join won't insert them. As it is, this would create the string "<a class="markdown-info"href="..."target="...">"

Same here with indentation and spaces at the ends of each string.

I'm going to make some small changes (a little bit to the style and adding localization) and push this. Thanks!