Spatial Index: adjust costs so we do not use the spatial index if the query does not contain an intersects operator.

MVStore: unique indexes that were created later on did not work correctly if there were over 5000 rows in the table.

For Windows, database URLs of the form "jdbc:h2:/test" where considered relative and did not work unless the system property "h2.implicitRelativePath" was used.

getTimeTry() was never being passed a null timezone, so don't check for that. Rather check if the timezone is still the default, so we can use the local cached Calendar.

Fix error message (running "./build.sh docs" automatically adds missing translations, so the only file that needs to be changed manually is _message_en.prop, and then the other files only when translating; untranslated entries have a # as the first character in the value)