Add default sql dump file

Signed-off-by: JWhy <jwhy@jwhy.de>
Add date navigator to grade overview, add day name

Signed-off-by: JWhy <jwhy@jwhy.de>
Check the token for the update script

Signed-off-by: JWhy <jwhy@jwhy.de>
Fix assets URLs in main template

Signed-off-by: JWhy <jwhy@jwhy.de>
No wrap for table, default routes for some grades

Signed-off-by: JWhy <jwhy@jwhy.de>
Also update the next date, delete empty rows

Signed-off-by: JWhy <jwhy@jwhy.de>