[8] Review request for JDK-8025230: [cleanup] some more javadoc formatting fixes for swing

[Yuri Nesterenko]

Hello,

there's more of the same, javadoc doclint error fixes
for some 23 more swing classes.

Bug https://bugs.openjdk.java.net/browse/JDK-8025230

Webrev http://cr.openjdk.java.net/~yan/jdk-8025230/webrev-00/

No changes in formatted content, again.

Thanks,
-yan