Resolve "allow to export subject languages"

Closes #507

See merge request !422

make sure that type is not null

See merge request !421

Merge branch '503-click-on-generate-mail-for-available-multilingual-voucher-template-occurs-in-internal-error' into 'master'

Resolve "click on "Generate Mail" for available multilingual voucher template occurs  in internal error"

Closes #503

See merge request !420

/run/smasch is created by smasch.service in runtime so we cannot use it in command line

See merge request !419

Merge branch '501-adding-subject-while-screening-number-is-unable-throws-internet-server-error' into 'master'

Resolve "adding subject while screening number is unable throws Internet server error"

Closes #501

See merge request !414

Resolve "review worker with no location"

Closes #500

See merge request !415

Merge branch '500-review-worker-with-no-location' into 501-adding-subject-while-screening-number-is-unable-throws-internet-server-error

Hard restart cause issue with smasch service

See merge request !417

Resolve "printing voucher is not possible"

Closes #499

See merge request !418

changelog updated

See merge request !416

Merge branch 'changelog' into 501-adding-subject-while-screening-number-is-unable-throws-internet-server-error

Resolve "removing location and rooms crushes with Internet server error"

Closes #491

See merge request !410

Merge remote-tracking branch 'origin/master' into 491-removing-location-and-rooms-crushes-with-internet-server-error

Resolve "small typos"

Closes #489

See merge request !402

Resolve "remove  `---` in Default country, in edit subject import details"

Closes #495

See merge request !411