#124: add a description tab to administrate the children block rending

 * title
 * content
 * visibility
 #124: fixes after code review

 * rename variable name
 * change the label link with a generic one
 * change the default descriptionEnabled value to false
 #124: fix coding style
 #124: fix conflict problem
 #124: add a translatable label for the link
Merge pull request #139 from MatCottet/issue124_step_page

 #124: add a description tab to administrate the children block rending