#186494 - misformated text in tab names of output windows

#186494 - misformated text in tab names of output windows
http://netbeans.org/bugzilla/show_bug.cgi?id=186494

Fixed in: http://hg.netbeans.org/core-main/rev/3a7d4b252013
Reviewed by: D. Simonek
Verified by: T. Musil

In its latest JDK update (1.6.0_20) Apple introduced a new bug into 
JTabbedPane - when a tab title is using HTML formatting and a custom 
component is inserted into pane's header then the rendering of tab title 
is broken.
Our output window implementation is based on JTabbedPane and we use HTML 
font bolding to inform users that output tab has a new content. The 
solution is turning HTML formatting off for Apple's L&F when running 
under JDK 1.6.0_20 - plain text will be used for tab titles and a "*" 
char in tab title will provide notification of a new content in the tab.