start counting weeks from the current week of `vorles_beginn`, fixes #2608

assigned to @elmar

approved this merge request

added 11 commits

• 97368d48...2ae8194d - 9 commits from branch main
• 878e0cf8 - start counting weeks from the current week of `vorles_beginn`, fixes #2608 (closed)
• d940fe76 - remove unused code

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mentioned in commit 038a5bdc

mentioned in commit 136d23c5

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mentioned in commit 177f9601

mentioned in commit 1652be51