this is dumb

Revert "Revert "fixes for the new comment/pm markup""

This reverts commit 12646b2d5e5ed4b7966ed456de3d8d478d5a4312.
few more fixes to make the comment nicer

-  move comment reply form to the right a bit to make it easier to see
   which comment we're replying
-  apply comment bubble to `.usertext-body`. this way the bubble will be
   gone when editing comment. this saves the headache of trying to fit
   the textarea inside bubble