Add sum of absences and tardiness to printout.

Closes #39

See merge request Teckids/BiscuIT/BiscuIT-App-Alsijil!20

Introduces the original bug instead of the current exception.

Remove external css.

Closes #37

See merge request Teckids/BiscuIT/BiscuIT-App-Alsijil!19

Merge branch '36-printout-background-color-from-first-row-in-day-not-overridden-in-date-column' into 'master'

Resolve "[Printout] background-color from first row in day not overridden in date column"

Closes #36

See merge request Teckids/BiscuIT/BiscuIT-App-Alsijil!18

Turn group week view into general week view.

Closes #34

See merge request Teckids/BiscuIT/BiscuIT-App-Alsijil!16

Currently translated at 96.1% (49 of 51 strings)

Translation: BiscuIT School Information System/BiscuIT-App-Alsijil
Translate-URL: https://translate.edugit.org/projects/biscuit-sis/biscuit-app-alsijil/de/

Use btn-dark everywhere. Closes BiscuIT-ng#94.

Closes BiscuIT-ng#94

See merge request Teckids/BiscuIT/BiscuIT-App-Alsijil!15

Disallow creating lesson documentation for lessons in the future. Close #30.

Closes #30

See merge request Teckids/BiscuIT/BiscuIT-App-Alsijil!13

Add link to print class register.

See merge request Teckids/BiscuIT/BiscuIT-App-Alsijil!14