Show image's full path name on window title bar

[JorgeStolfi]

Expected behaviour

The window title bar should show as much of the given image name as would fit in that space. For example `eom foo/A.png bar/A.png" should show "foo/A.png" or "bar/A.png" on the window title bar. If there is not enough space, the tail of the name should be shown, preceded with "...".

Actual behaviour

The window title bar shows only the last element of the file's name. In the above example, it would show just "A.png" for both images.

This is bad because it s is quite common for different images in different folders to have the same name, e.g. when a program creates many images with names like 'frame0001.png', 'frame0002.png', etc. The user then needs to see the folder name to know which image he is looking at.

Steps to reproduce the behaviour

Create folders "foo" and "bar". Copy images into both with the same name, "foo/A.png" and "bar/A.png". run eom {foo,bar}/A.png

MATE general version

1.24.0

Package version

1.24.0

Linux Distribution

20.04.1-Ubuntu

Link to bugreport of your Distribution (requirement)

https://help.ubuntu.com/community/ReportingBugs