Annotation - improvements

* Remove the annotationLayers from project config file if no spatialite extension loaded or no jAcl2 rights
* Refactor the code in the annotation controler : use private properties and declare some methods as private
* Refactor the code in the service controler : idem
italian translation update
Merge pull request #4 from slarosa/master

italian translation update
CSS - Increase header menu height to 30 pixels
Merge from upstream master
Translation - correct missing variable