Some template fixes and improvements:

- Fixed absoluteurl in motion detail template. Renamed '_edit' to '_update'.
- Fixed wrong projector link ind assigment poll template.
- Improved assignment projector slide.
- Fixed #884: Add PDF note to translation string "Show paragraph numbering"
Merge pull request #905 from emanuelschuetze/projector-fixes

Fixes and improvements for projector and template
Cleaned up utils
Merge pull request #895 from ostcar/utils

Cleaned up utils