PDFTool: Changed layout rendering of bottleneck infobox. Rationale: There is a conditional warning for bottlenecks necessary which have a ZPG Exception for their respective survey data. This line has to be added to the existing information in the bottleneck infobox. Therefore the layout has to be a bit more dynamic - depending on status of said condition having this exception. The existing code was enhanced to take this fact into account. A spacer variable was used for spacing between bottleneck info and the according legend. The layout of the bottleneck info grows dynamically. The overall optics where a bit streamlined.

The gemma database schema requires PostgreSQL >= 11.

`dot.tmpl` is a template file for `postgresql_autodoc`
to be more similiar to UML and leave out some less useful labels.

See  `../docker/README.md`

Look at `updates/README.md` to how databases are updated.