Added js-only class, that only shows its element when js is activated

Closes #530 (closed)

added 55 commits

• 123c0fc0...9452c2cd - 54 commits from branch development
• bebc0a4d - Merge branch 'development' into '530-js-only-class'

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added 1 commit

• ce63c696 - Delete rev-manifest.json

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added 1 commit

• d9753a5c - Fehlerhafte Datei entfernt

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added 1 commit

• 35bb1485 - Weitere Bugfixes

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added 1 commit

• cb67b491 - Bugfix

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mentioned in commit ac8a66b3

merged

mentioned in commit 3b56d73c

mentioned in merge request !966 (merged)