FIX: bug on Button's icon prop.
FIX: bug on Button's icon prop.

electro-modules/matisse-components,electro-modules/matisse-components,selene-framework/matisse-components,selenia-plugins/matisse-components,selenia-plugins/matisse-components,selenia-plugins/matisse-widgets,selene-framework/matisse-components,selenia-plugins/matisse-components,selenia-plugins/matisse-widgets,electro-modules/matisse-components,selene-framework/matisse-components,selenia-plugins/matisse-widgets,electro-modules/matisse-components