set_page_title
Description:
Sets a title for page.
The title is displayed in the header area of the assistant when page is the current page.
Parameters:
| this | |
| page | a page of this | 
| title | the new title for  | 
Sets a title for page.
The title is displayed in the header area of the assistant when page is the current page.
| this | |
| page | a page of this | 
| title | the new title for  |