RFR: 7032: The banner is missing from help page

[Marcus Hirt]

On Fri, 11 Dec 2020 11:38:26 GMT, Marcus Hirt <hirt at openjdk.org> wrote:

>> I'm expecting for the banner to look ok in its native resolution, with no white border around it, and that on high resolution screens, that there is no abrupt ending of the banner image, but rather that the background color continues in the same color as the ending of the image. I'll photoshop my image above to what the expected result would look like.
>
> ![image](https://user-images.githubusercontent.com/16906077/101899229-bf4fef80-3bad-11eb-8a72-081502d740a1.png)

Background color of the rightmost pixels is #c7c7c7. Using that as a background color makes it look like the image just continues forever on wide screens.

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PR: https://git.openjdk.java.net/jmc/pull/173