Feature/1 05 1926 bug fixing

1. What does the MR / why we need it:

closes #1

2. Make sure that you've checked the boxes below before you submit MR:

• I have read and applied the design rules
• Was the feature branch updated from the develop branch and were there no problems?
• Have new tests been created if possible?
• Are all tests running ?
• Was documentation made if necessary?

3. There were additional issues that were solved in this branch? (optional)

• several issues;
• due to migration from SVN/Redmine to git, there are a lot of issues within the branch, which could not referenced here

4. CHANGELOG/Release Notes (optional)

Thanks for your MR! 👍

5. Next steps

• start with the code review
• Check ticked status!
• Does the merged branch have to be dissolved?

after the merge

• implement language tags #11