Fix problems in 'view catalog'

[SieBRUM]

Add catalog tests

Keep pagination at bottom at all times

Images jump when changing

When screen is too small, the datapicker gets out of view

datepicker-unavailable is atm not well constructed (we discussed in discord), has a bug.
But the fact that this bug was not found during the creation of the unit tests actually says that the unit tests are not good / not pulled well enough. Try to apply only 1 change per test (so don't apply status EN requiresApproval in one test, for example, but really separate test for writing, and possibly another test where both change or something)

Also, ARCHIVED does not work. Would not eg not 'temporarily unavailable' but 'this product is permanently unavailable' or something, indicate that it will never be available again. (filed is miss not clear enough)

See SieBRUM/aci-frontend#30 for more information