fix/#330: hover over tooltip for outer spans and it's selected text

Bug fix

Summary

Apart from what is mentioned in the main ticket you are going to close with this MR, tell us what you have done to achieve this goal.

• As reported on this issue ticket, hover over the selected motif is fixed. Need to test in syriac collection and for that have to pull the branch issue/#330-hover-tooltip into local and run.

EX: Cambridge, Univ. Cant. Add. 2020 - Sheet - 67r - Motifs:

• wise fool sinful
• meekness/ showing respect

Does the result of the MR comply to our "definition of done"?

• Unit tests passed
• Code reviewed
• Acceptance criteria met
• Functional tests passed
• Non-Functional requirements met
• Product Owner accepts the User Story

Related

Closes

Changelog

• I added a statement to the CHANGELOG.

Documentation

• I updated the README (if applicable)
• I provided my functions with appropriate documentation

/cc Mathias Göbel, Frank Schneider, Michelle Weidling