[TASK] Missing units "inches" and "points"

Two common document units are missing:

- Inches
- Points

Furthermore, the units should not be abbreviated and become
translatable.

Change-Id: Ieb4478586d3710814cd038de6d9cbdbbdcde0e04
Resolves: #70902
Releases: master
Reviewed-on: https://review.typo3.org/44217


Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>