Revert "- Included modal form window to edit the elements in context class (CRUD functions);"

This reverts commit 5566f1d322251474a4c8da00acc6881d453797e5.

Conflicts:

	app/views/contexts/edit.html.erb
	app/views/in_context_classes/edit.html.erb
	app/views/indexes/edit.html.erb