As survey owner I want to create, edit, open and close a survey

[japsu]

• create survey
• change settings of survey
  • allow changing anonymity only if there are no responses (currently not shown on form) Improved survey privacy choices #402
  • better feedback for submitting the form Figure out how to give better feedback on Next.js server forms when we do not navigate after submit #376
  • confirm navigation if unsaved changes
• delete a survey
  • ask for confirmation for removal
  • forbid deleting a survey that has language versions
  • soft delete for all surveys/surveys with responses? (mark as deleted, don't really delete) When can a survey be removed, and should it be a soft removal / archiving instead? #432
• make dimension editor a tab of the survey editor
• open and close the survey for responses
• add a language version
• edit title and description of a language version
  • better feedback for submitting the form Figure out how to give better feedback on Next.js server forms when we do not navigate after submit #376
• edit fields of a language version
• remove a language version
  • ask for confirmation for removal
  • forbid removal of a language version using which a response has been made
  • soft delete? (mark as deleted, don't really delete) When can a survey be removed, and should it be a soft removal / archiving instead? #432