<Swing Dev> [11] Review Request: 8199150 and 8150156

[Sergey Bylokhov]

Hello.
Please review the fix for jdk11, which fixed some accessibility issues 
in the specification.

Bug: https://bugs.openjdk.java.net/browse/JDK-8199150
      https://bugs.openjdk.java.net/browse/JDK-8150156
Fix: http://cr.openjdk.java.net/~serb/8199150/webrev.01

Description:
  - The links to "bugs.sun.com" were replaced by "bugs.java.com"
  - To most of our doc-files the "<main>" tag is added.
  - In some files the numbers in "H" tag are renumbered to h1/h2/h3
  - In JTextComponent the tag was removed, this line was missed in 
JDK-8184219
  - The accessibility checkers report that the red color on the 
white/gray background has "Insufficient contrast", so I replaced red to 
blue color

-- 
Best regards, Sergey.