fixes #1717

Fixes #1597: Added `enableAutoLogin` to basic and advanced application templates so "remember me" now works properly

Backend should be always totally closed for indexing by search engine robots

we should not provide one in the package but developers should commit
them when starting a new project so that all share the same versions
and only explicit composer update command will change that.
Escpecially important when deploying to production.

This reverts commit a28e7470.

Cleaned up a few comments ... hope its not my OCD again... :-)

Reverted name to ```closeButton``` to be in sync with the bootstrap ```Alert``` widget.

1. Renamed closeButton to closeButtonOptions. 
2. Generate unique id for each alert box.
3. Moved parent init to the top.

Each flash variable can be mapped to a bootstrap alert type through a configuration array passed to this widget.