reactivated help button and fixed xquery parameters problems

[daniel-jettka]

Description, Context and related Issue

The help button and page was commented out, and needed some change to be displayed and trigger help window opening.

Refs #209

How Has This Been Tested?

checked manually in Klarinettenquintett and EditionExample

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Improvement
• Refactoring

Overview

• I have updated the inline documentation accordingly.
• I have performed a self-review of my code, according to the style guide
• I have read the CONTRIBUTING document.

[peterstadler]

While the help button works in my test with the clarinet quintet, the internal links within the help page don't work. Clicking on e.g. the link "Vorbereitung" from the help TOC opens a new browser tab with the Edirom Online index page.

[daniel-jettka]

While the help button works in my test with the clarinet quintet, the internal links within the help page don't work. Clicking on e.g. the link "Vorbereitung" from the help TOC opens a new browser tab with the Edirom Online index page.

This is the problem in #24 right?

Can we move the conversation there and merge this one anyway because #209 was only about reactiviating, not the content and we have the #24 ?

[peterstadler]

Ups, I didn't notice #24.

But the other code comments are still valid for this PR, for those changes should be motivated.

[peterstadler]

I personally dislike all these merge-dev-into-feature-branch commits and prefer rebasing for a clean history. That said, the code changes look ok, many thanks!