Add textbox to store session comments. Fixes issue #3492.

git-svn-id: http://heidisql.googlecode.com/svn/trunk@4693 560a3889-bb33-0410-9f33-43a8a102dc09
Prepare upcoming 8.3 release

git-svn-id: http://heidisql.googlecode.com/svn/trunk@4694 560a3889-bb33-0410-9f33-43a8a102dc09