set_show_size
Description:
If show_size is true, the font size will be displayed along with the name of the selected font.
    
Parameters:
| this | |
| show_size | true if font size should be displayed in dialog. | 
If show_size is true, the font size will be displayed along with the name of the selected font.
    
| this | |
| show_size | true if font size should be displayed in dialog. |