Add prev and next button for week view. Closes #19.

Closes #19

See merge request Teckids/BiscuIT/BiscuIT-App-Alsijil!5

It accidentally removed the possibility to select a group manually.

mirabilos authored 5 years ago and mirabilos committed 5 years ago

Advances #9.

An alternative way of writing…

	foo.filter(a, ~Q(b))

… is…

	foo.filter(a).exclude(b)

… if this way is disturbing to the reader.

mirabilos authored 5 years ago and mirabilos committed 5 years ago

(This adds back several dozen SQL queries, tbf later.)