RFR: 8296335 : Fix accessibility manual test instruction [v7]

[lawrence.andrews]

> Fixed test instruction that helps the manual tester to perform actions
> 
> @shurymury

lawrence.andrews has updated the pull request incrementally with four additional commits since the last revision:

 - Update TreeDemo.html
 - Update TableDemo.html
 - Update ComboBoxDemo.html
 - Update ButtonDemo.html

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/10996/files
  - new: https://git.openjdk.org/jdk/pull/10996/files/d9926b3c..09c7ea93

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10996&range=06
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10996&range=05-06

  Stats: 4 lines in 4 files changed: 0 ins; 4 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/10996.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10996/head:pull/10996

PR: https://git.openjdk.org/jdk/pull/10996