Allow to insert component into special buffer to preload them before any actions in your application.
Buffer is preload during fvaswing.FvAsWing instanciation.
Adds components to buffer before FvAsWing.getInstance() or
{code FvAsWing.init()} methods call.
FeverStage broadcast fvaswing.FvAsWing.onUICompleteEVENT event when components are preloaded and UI is ready to be used. ( just after the 1st UI paint ).