RFR: 8279794: Fix typos in BasicScrollBarUI: Laysouts a vertical scroll bar [v2]

[Phil Race]

On Tue, 18 Jan 2022 17:29:07 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

>> Fixed the typo in the layout methods: “Laysouts a…” → “Lays out a…”.
>> 
>> The doc for `layoutHScrollbar` incorrectly referred to _vertical_ scroll bar rather than horizontal one.
>> 
>> 
>> I also expanded the wildcard imports.
>
> Alexey Ivanov has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add a blank line between java- and javax-package classes

Marked as reviewed by prr (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/7032