On the Close Votes queue, there is
Why should this question be closed? indicating what the dialog's purpose is.
On the Suggested Edits, there is nothing.
However, looking at the source, it seems they initially had the title, but the html is messed.
<h2>why are="" you="" rejecting="" this="" edit?<="" h2="">
The fix looks great! However...
The new dialog has some padding that looks a bit weird:
The other popups do not have the spacing at the top.
On closer inspection of the source, I see
It seems to be causing the spacing, as when I un-nested the form from the div, the result was:
Lastly, the dialog for every other review queue allows movement from the title. (Hover your mouse over, and you can move the dialog)
This is with the code:
<h2 class="popup-title-container handle" style="cursor: move;"> <span class="popup-breadcrumbs"></span><span class="popup-title">Why are you rejecting this edit?</span> </h2>
Sorry if I'm being picky :)