Twenty Ten: style.css comment form related cleaning, enhancement

[zeo]

1) Removed obselete CSS selector #respond dl, dt, dd that was added in [13180] for #form-allowed-tags which was later removed in [14689].

2) Added back margin top for .form-submit which was deleted in [13180]. This will add some gap in between #form-allowed-tags and .form-submit. see: comparison.png for before-> after comparison.

3) Add margin bottom to #respond. Added some gap after comment_form hook before the border. This issue easily spotted when replying to comment (with JS). <?php do_action( 'comment_form', $post_id ); ?> is just an output example if a plugin or theme using the hook. see: comparison.png for before-> after comparison.

comparison.png

Oops! Forgot to tick "Replace existing attachment..."

Patch for issue 1, 2 and 3. Refreshed against [15153], [15154], [15155]

Fixed in [15163]