Vertical tabs: remove word break setting

See discussion here: https://groups.google.com/d/msgid/tiddlywiki/467c887e-edf6-4187-9727-bf806fdeb711%40googlegroups.com

themes/tiddlywiki/vanilla/base.tid

@@ -1806,7 +1806,6 @@ html body.tc-body.tc-single-tiddler-window {
 }
 
 .tc-tab-content.tc-vertical  {
-    word-break: break-word;
 	display: inline-block;
 	vertical-align: top;
 	padding-top: 0;