improve guestbook guides and link to them, add download button

[pdurbin]

What this PR does / why we need it:

Users could use some help understanding how guestbooks work by reading the guides. We provide a link to the guides in a few more places. We also add a download button on the page that lists guestbooks so that users don't have to first click "View Responses" to see responses and then click "Download" to download them.

Which issue(s) this PR closes:

Closes #8244

Special notes for your reviewer:

streamResponsesByDataverseAndGuestbook was mostly copied from GuestbookResponsesPage.streamResponsesByDataverseAndGuestbook.

Suggestions on how to test this:

• Make sure the links to the guides appear in the places show in the screenshots below.
• Make sure the download link in the screenshot below works.

Does this PR introduce a user interface change? If mockups are available, please link/include them here:

Yes. The "To learn more about" line was added in several places. Also, a new download button was added to the list of guestbooks.

create guestbook

• Link to guides added to the top.

edit guestbook

• Link to guides added to the top.

view terms while no guestbook is selected (edit access)

• Added link to guides and reworded text under Guestbooks.
• Note that the "help-block" CSS class was added to make the text grey.

view terms while no guestbook is selected (no edit access)

• Guestbook panel is hidden (because it's irrelevant).

select a guestbook

• Link to guides added.

download guestbooks from list of guestbooks

• Download button under "Action" for each row.

Is there a release notes update needed for this change?:

Yes, added.

Additional documentation:

A significant rewrite of the guestbooks section of the User Guide is included.

[TaniaSchlatter]

Thanks for the screenshots, @pdurbin. Which user types see the "view terms while no guestbook is selected" example? Dataset downloaders? Dataset owners? Both?

[pdurbin]

@TaniaSchlatter both.

[TaniaSchlatter]

@pdurbin ideally dataset users do not see the Guestbook module unless there is a Guestbook (view terms while no guestbook is selected example). I recognize that might be out of scope. As is, the language is written for a data owner, and might be confusing to a data user. Let's discuss options.

The button looks great!

[pdurbin]

@TaniaSchlatter @scolapasta and I had a nice pow wow about next steps.

I went over some changes to the guides I wanted to met and after we hung up I implemented them (plus a couple more) in d27a45b. This includes putting quotes around button labels, as discussed. Feedback is certainly welcome.

I also lowercased to "guestbooks" in 0d34784 as discussed.

A principle we discussed is that downloaders don't need to see the link to the guides. Toward that end, as suggested above, we plan to hide the entire Guestbooks panel for non-editors (people just browsing anonymously, for example) if there is no guestbook selected. (Less is more. Don't make me think.) Since only editors will see this we can change the message from "you will not" to "users will not".

I'll ping Tania when I'm done with the panel so we can take another look.

[sekmiller]

Looks good.