Text not marked as containing link to another page/website in XWiki PDF export

[ane-gabriela]

Steps to reproduce:

1. Create a new Diagram
2. Add some shapes
3. Add a word in each shape
4. Select the word from one of the shapes
5. Click on the Link... button below Insert from the right panel
6. Select a wiki page > Apply
7. Select another shape/word
8. Click on the Link... button below Insert from the right panel
9. Select External and paste an URL eg. https://en.wikipedia.org/wiki/Flower
10. Click Save & View
11. Access More actions > Export > Export as PDF
12. Deselect all options > Export

Expected results: Text is marked as containing links to internal/external pages.

Actual results: Text is not marked but when hover the links are there.

Environment: Windows 10, XWiki 11.10.4 with MySQL 5.7 and Chrome 80

xwiki_Diagram_User+1+Diagram_WebHome.pdf

[oanalavinia]

This reason for this issue is that the style of a link (underline and blue color) was not added in #101 (note that the links are working)