fix: do not show hidden calendars #6705

Job	Run time
php8.1 on stable31 unit tests	33s
php8.1 on master unit tests	38s
php8.1 on stable30 unit tests	35s
php8.2 on stable31 unit tests	33s
php8.2 on master unit tests	37s
php8.2 on stable30 unit tests	33s
php8.3 on stable31 unit tests	32s
php8.1 on stable31 integration tests	31s
php8.3 on stable30 unit tests	31s
php8.1 on master integration tests	55s
php8.3 on master unit tests	36s
php8.4 on stable31 integration tests	30s
php8.2 on stable31 integration tests	50s
php8.4 on master integration tests	32s
php8.3 on stable31 integration tests	30s
php8.4 on stable31 unit tests	31s
php8.4 on master unit tests	36s
php8.1 on stable30 integration tests	49s
php8.2 on master integration tests	53s
php8.2 on stable30 integration tests	47s
php8.3 on master integration tests	38s
php8.3 on stable30 integration tests	46s
php-test-summary	2s
	13m 58s

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