Header bookmarks

[domwhewell-sage]

Is your feature request related to a problem? Please describe.
When adding a link in the tinymce editor you can make it an internal link to a heading ->
(Entering in # makes it an internal hyperlink)

The tinymce editor then adds an id attribute to the heading tag, e.g.

<h1 id="h_1741158734421718551414403">Introduction</h1>

This id tag is currently stripped and does not end up as a bookmark in the generated docx

Describe the solution you'd like
The hyperlink currently gets generated correctly

But the bookmark does not

It would be good if bookmarks could be added into the renderer

Describe alternatives you've considered
I had considered adding in a title_bookmark field to each finding by adding in the function which only adds in the rich text

def bookmark_rich_text(self, text, url):
        bookmark = RichText()
        bookmark.xml = '<w:bookmarkStart w:id="" w:name="{}"/>{}<w:bookmarkEnd w:id=""/>'.format(url, text)
        return bookmark