RFR: 7421: Update Japanese translation for pages [v2]

[mohno007]

> This PR updates/improves Japanese translation for pages.
> 
> Update texts based on new commits to `messages.properties` made after the last update date of the `messages_ja.properties`.
> 
> You can see decoded version of `messages_ja` using this script:
> 
> 
> native2ascii -reverse application/l10n/org.openjdk.jmc.flightrecorder.ui.ja/src/main/resources/org/openjdk/jmc/flightrecorder/ui/messages/internal/messages_ja.properties

mohno007 has updated the pull request incrementally with three additional commits since the last revision:

 - Use "スパン" for "span"
 - Use "表" instead of "テーブル"
 - Update copyright year

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

Changes:
  - all: https://git.openjdk.java.net/jmc/pull/310/files
  - new: https://git.openjdk.java.net/jmc/pull/310/files/11b2825f..3fdce404

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jmc&pr=310&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jmc&pr=310&range=00-01

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jmc/pull/310.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/310/head:pull/310

PR: https://git.openjdk.java.net/jmc/pull/310