Implement #414 and fix col-span visual bug

[Pireax]

Description:

Makes all table rows which are expandable clickable anywhere and fixes a small visual bug due to a wrong column span.

Related issue (if applicable): fixes #414

Checklist:

• The code change is tested and works locally.
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation if necessary
• There is no commented out code in this PR.
• My changes generate no new warnings (check the console)

[datdamnzotz]

👍