Crucible expand the author/line number column width when inline comment is adding/added

1. Jump to the side because the gutter columns showing line number, author and changeset id expand. This occurs on Safari and Chrome, but not on Firefox. This occurs on 3.4.6-SNAPSHOT and 3.5.0-SNAPSHOT

(This is not regression but it would be great to fix)
Given
User $A is on review $r1
$r1 has frx $f1
$f1 has no comment

When
$A is viewing $f1
$A click on any line to make a comment, the comment form shows

Expect
The widths of columns of the code should stay the same.

Actual
Some columns seem to expand and some seem to shrink, which make the UI jumpy.

Info
This should be related to the table layout of the review page. And the comment/comment form is actually a table cell with a colspan of X which force the browser to recalculate the widths of columns.