New structures for Issue #19 Multi Actions

* Remapped the all SBEEvent[]
* * The Connection has implementation of basic iteration.
* * Control of chain-actions (see https://bitbucket.org/3F/vssolutionbuildevent/issue/19/multi-actions#comment-12799056) should be as external component for others subcommands, currently only as stub with the 'states'
* * TODO: handler of upgrading for v0.7 -> v0.9
* New UI for event-items operation as action list:
* * Major changes: additional the external ui-logic, new operations with action list, ui-helper, etc.
* * Added component - DataGridViewExt :: net.r_eg.vsSBE.UI.WForms

also TODO:
* Changing for Xaml tool pane with new action list
* summary of events with loading configuration - see _state
* core of the scripts for state of chain-actions