Configuration improvements

Unified configuration for the size limit of the quick search (#663758)

The configuration for limiting the number of results in the quick search has been streamlined. The system property globalSearchResultSizeLimit of the module cmweb-server-adapter has been removed. Instead, the page customization attribute maxHints of the type globalSearchField is now solely responsible for determining the maximum number of results per entity type in the quick search. Its description has been improved to better state its meaning.

Update behavior

If the page customization attribute maxHints was empty before the update, it is updated automatically with the value of the removed system property globalSearchResultSizeLimit, so that the quick search behaves as before after the update.