Titlepage: Properly align examiners and exam date
Titlepage: Properly align examiners and exam date

This commit fixes two violations between the specified design of the titlepage and its implementation in the template:
- there was no blank line between between the examiners and the line with the date of examination
- the date of examination was not properly aligned (TBList does not a sufficient job here)
- the space between the date of examination and the name of the institute was too narrow
latextemplates/uni-stuttgart-dissertation-template