Add disableToolbarItem method to the js Abstract controller.

23. Find a way and implement authentication on the client.
-   If a user is not allowed to edit, dont execute the edit action.
+   Is the toolbar does not have a button with the action edit, the editor will be stopped.
26. Make a global search option if and add this to the paging toolbar
-   this search function need to search the whole model
-   and only show the rows with matched fields.
27. Make a global documentation option and add this to the toolbar or pagingToolbar.
-   Open a documentation page if the button is clicked.
Add madflow/flow-markdown library to the project.