File/Buffer: take advantage of more GFile standard attributes
@swilmet
Submitted by Sébastien Wilmet Link to original bug (#781370)
Description
GtefFile/GtefBuffer: take advantage of more GFile standard attributes.
- G_FILE_ATTRIBUTE_STANDARD_DESCRIPTION for the window title or tab tooltip?
- G_FILE_ATTRIBUTE_STANDARD_EDIT_NAME for save as?
- others?