Bugfixes

Bugfix - OracleStatementSemanticModel - correlated subquery asterisk
clause not redundant anymore
Bugfix - OracleCodeCompletionType - schema object suggested in FROM
clause within subquery event when cursor touches closing parenthesis
Bugfix - Hopefully the tab item binding crash does not cause application
to hang when closing
Bugfix - 'running' notification continuously shown when 'Fetch all'
command is executed