Moved checks for semantic correctness of translation messages keys to the new proc lang::message::check,introduced such proc into message edit form and in new regression test lang_messages_correct.Added check to ensure localized separators for thousands and decimals are different. Equal separatorswould have caused localized number parsing to fail.
- use property "doc(title)" instead of property "title" to get rid of warnings in error.log of the form: Warning: /forums/message-view has no doc(title) set. Using doc(title) is required in blank-master.tcl
- use property "doc(title)" throughout oacs-5-8 instead of "title" to get rid of warnings in error.log of the form: Warning: /forums/message-view has no doc(title) set. Using doc(title) is required in blank-master.tcl but was used so far only in a few packages