Netscape 4.x tries to honor the <TD WIDTH="100"> tag on the middle column

Netscape 4.x tries to honor the <TD WIDTH="100"> tag on the middle column
and will squeeze the "EDIT | DEL" column on the right such that it gets
truncated if the text is too wide (e.g., Finnish). TD's WIDTH attribute is
deprecated in HTML 4.x, and it seems that Netscape 6.x and IE 6.0 mostly
ignore it, which is why the problem doesn't show up in those browsers.
With this change, the table formats properly for me in Netscape 4.08,
Mozilla 0.9.7+, and IE 6.0.

git-svn-id: https://svn.code.sf.net/p/squirrelmail/code/trunk/squirrelmail@2231 7612ce4b-ef26-0410-bec9-ea0150e637f0