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

[Marcus Hirt]

On Sat, 22 Jan 2022 01:38:50 GMT, mohno007 <duke at openjdk.java.net> wrote:

>> 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

@mohno007 - please integrate your changes by writing /integrate in a comment.

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