Helpfile refactoring.

docs/en_US/schema_dialog.rst

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+Schema Dialog
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+Use the *Schema* dialog to define a schema. A schema is the organizational workhorse of a database, similar to directories or namespaces. To create a schema, you must be a database superuser or have the CREATE privilege.
+
+The *Schema* dialog allows you to implement options of the CREATE SCHEMA command. For more information about the CREATE SCHEMA command, please see:
+
+   http://www.postgresql.org/docs/current/static/sql-createschema.html
+
+ The *Schema* dialog organizes the development of schema through the following dialog tabs: *General* and *Security*. The *SQL* tab displays the SQL code generated by dialog selections.
+ 
+.. image:: images/schema_general.png
+
+Use the fields on the *General* tab to identify the schema.
+
+* Use the *Name* field to add a descriptive name for the schema. 
+* Select the owner of the schema from the drop-down listbox in the *Owner* field.
+* Store notes about the schema in the *Comments* field.  
+
+Click the *Security* tab to continue.
+
+.. image:: images/schema_security.png
+
+Use the *Security* tab to assign privileges and security labels for the schema. 
+
+Click *Add* to assign a set of privileges in the *Privileges* panel:
+
+* Select the name of the role from the drop-down listbox in the *Grantee* field.
+* Click inside the *Privileges* field. Check the boxes to the left of one or more privileges to grant the selected privileges to the specified user.
+* Select the name of the role that is granting the privilege from the drop-down listbox in the *Grantor* field. The default grantor is the owner of the schema.
+
+To discard a privilege, click the trash icon to the left of the row and confirm deletion in the *Delete Row* popup.
+
+Click *Add* to assign a security label in the *Security Labels* panel:
+
+* Specify a security label provider in the *Provider* field. The named provider must be loaded and must consent to the proposed labeling operation.
+* Specify a a security label in the *Security Label* field. The meaning of a given label is at the discretion of the label provider. PostgreSQL places no restrictions on whether or how a label provider must interpret security labels; it merely provides a mechanism for storing them. 
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+To discard a security label, click the trash icon to the left of the row and confirm deletion in the *Delete Row* popup.
+
+Click the *SQL* tab to continue.
+
+.. image:: images/schema_sql.png
+
+Your entries in the *Schema* dialog generate a SQL command; you can review the command on the *SQL* pane.
+ 
+* Click the *Info* button (i) to access online help. 
+* Click the *Save* button to save work.
+* Click the *Cancel* button to exit without saving work.
+* Click the *Reset* button to restore configuration parameters.
+
+Example
+=======
+
+The following is an example of the sql command generated by selections made in the *Schema dialog*:
+
+.. image:: images/schema_sql_example.png
+
+The example creates a schema named hr; the command grants *USAGE* privileges to *public*.
+