Resolve "Jump to first lesson instead of current time in timetables"

Closes #273

See merge request !390

Fix change detection in automatic plan

See merge request !391

Resolve "Make substitutions table more compact"

Closes #271

See merge request !389

Resolve "Don't show monday on sundays"

Closes #272

See merge request !388

Fix empty querysets

See merge request !387

Resolve "Permissions for timetables are not checked properly"

Closes #251

See merge request !369

Resolve "Hide days"

Closes #264

See merge request !385

Resolve "Make group/teacher/rooms buttons a toggle"

Closes #265

See merge request !386

Resolve "Add mascot"

Closes #262

See merge request !383

Optimize query for supervision events

See merge request !384

Confidential Issue

Closes #261

See merge request !382

Optimize get objects

See merge request !381

Resolve "Timetable menu permissions load all lessons"

Closes #259

See merge request !379