Bugfixes for connection

-Bugfix: the main dbInfo on mainform was being passed accidentally as
reference in RecentConnections.
-Bugfix: MySql list databases on connection form wasn't working
properly.
-Bugfix: using sqldb: When writing an sql statement (that alter
structure or data) such as create,drop,alter,insert,update etc. the
transaction wasn't commiting changes to db
-Other bugfixes