Update 'h' shortcut for hide outline. Add annulus and wavefront inspector help texts

[gr5]

I made it 3 separate commits so you can look at them separately but all 3 of these together are still very very simple.

fix #223 I fixed it so that when you hit the "h" shortcut key, it previously toggled visibility of the outlines but now it also toggles the "hide outline" checkbox such that if you then click the checkbox it works as expected.

fix #258 - I added to Dale's existing help text for annulus help

fix #259 - I added a small bit of text on the wavefront inspector to clarify slightly what it does.

[github-actions]

🚀 New build available for commit 87c7501
Download installer here

[atsju]

I edited your description to autoclose the issues on merge :
https://docs.github.com/en/issues/tracking-your-work-with-issues/using-issues/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword

Code looks OK I did not test the features.

[gr5]

@githubdoe - do you want to look over the text changes I made to wavefront inspector and more importantly annulus help? You don't need to but I thought you might want to. I'll leave this PR unmerged for at least another 24 hours in case you want to look at it.