Print Dialog - Print to File - "Select a File" Usability Issue

[Free Beachler]

Steps to Reproduce:
- Open an application that uses the Ubuntu Print dialog, such as a web browser.
- Click Ctrl-P - the Print dialog will appear.
- Click Print to File as an option - the "File" field will appear as a button.
- Click the File button - the "Select a File" dialog will appear.
- Use the main window area to navigate to a different folder.
- Start typing the new filename you want to select.

Expected:
Since the "Name:" field is highlighted, typing in the dialog changes the Name: field.

Actual:
Typing has switched context to a search in the navigation window, despite the Name: field being highlighted. Pressing Esc does not change this context switch.

Details:
The print-to-file dialog allows the user to edit the save-as-filename for the print. When the edit dialog appears, the filename is highlighted so it can be easily changed by typing. If the user navigates to a different folder, the filename is still highlighted, but typing in the dialog switches context to become a search for the file navigation section of the dialog. The user must now re-select the filename field, which typically requires more than one mouse-click (or keyboard action) to select the filename sans extension. A screenshot is attached in attempt to help describe the issue.

[Free Beachler (tenacious)]

The use-case that should be observed might be described as follows: the user has opened the Select a File to edit the filename. Even if the user wants the file stored in a different folder, it is less common for them to require searching in the navigation window than it is to 1) just edit the name of the file in the same folder; 2) change the name of the file and the folder it is saved at.