Make Dashboard tabs look same as other subs

HTML cleanup for the tabs on /r/dashboard which makes them look
consistent with Reddit's default tabs. No change to functionality but
simplifies the code, while reducing amount of CSS. IMPORTANT: requires
changes to custom stylesheet of /r/dashboard subreddit. See new CSS in
pull request description.

New CSS for /r/dashboard subreddit custom stylesheet for @honestbleeps:

    .side span.rank,.side div.midcol,.side div.entry div.expando-button,.side p.tagline,.side ul,.side div.expando{display:none}.side a.title{display:block;position:absolute;top:-50px;left:2130px;width:600px;font-size:11px;z-index:500}#noresults,div.titlebox,div.sidebox,div.sidecontentbox{display:none}#userTaggerTable .deleteButton{cursor:pointer;color:orangered;text-decoration:underline;float:right}#userTaggerTable,#newCommentsTable{border:1px solid #cccccc}#userTaggerTable thead,#newCommentsTable thead{background-color:#f0f3f7}#userTaggerTable td,#newCommentsTable td{border:1px solid #cccccc;padding:14px 18px;min-width:140px}#userTaggerTable td{white-space:nowrap}#userTaggerTable td:first-child{width:170px}#userTaggerTable th.delete,#userTaggerTable td.delete{max-width:40px;text-align:center}#userTaggerTable th,#newCommentsTable th{cursor:pointer;border:1px solid #cccccc;padding:14px 18px;min-width:100px}#userTaggerTable thead td,#newCommentsTable thead td{cursor:pointer}div.show{margin-bottom:12px}#newCommentsTable th:first-child,#newCommentsTable td:first-child{width:400px}#userTaggerTable td:nth-child(2){white-space:normal}

The above CSS removes 'display: none' from #newCommentsContents and also removes all styling affecting .redditname and .tabmenu. It's been compressed because I can't access the original stylesheet.