[client-event-handlers] Remove unneeded variable

[client-event-handlers] Use a better name

[client-event-handlers] Special grid refresh for client event handlers
The refreshGridAfterSave is a new function that can be invoked by the client event handler actions. It passes a callback to the original refreshGrid function which now accepts a third argument. This argument is used to invoke the callback once the filtering performed by the function finishes (this callback invocation is the last statement that will be executed).

[client-event-handlers] Implement post-save actions calling in standard grids

[client-event-handlers] Updated copyright year

[client-event-handlers] Postpone auto-save action if post-save actions exist

[client-event-handlers] Make use of event handler registry in standard view

[client-event-handlers] Send missing parameter

[client-event-handlers] Added extraParameters
Added extraParameters argument for call and callbackExecutor functions of EventHandlerRegistry

[client-event-handlers] Registry infrastructure