[Feature request] mate-display-properties: Make a backup of existing monitors.xml to avoid it being over-written

[davidhedlund]

Expected behaviour

Make a backup of existing monitors.xml before it is over-written

Actual behaviour

MATE does not generate a backup file of monitors.xml.

Steps to reproduce the behaviour

gnome-control-center is making a backup file of monitors.xml before it is over-written, text copied from #712:

"Steps I used to reproduce the issue in Ubuntu 22.04 with ubuntu-mate-desktop installed:

• Log into GNOME
• Ubuntu comes with GNOME, so install MATE in addition: sudo apt-get install mate-desktop-environment-extras mate-desktop-environment
• Log out, and log in to MATE.
• Run $ mate-display-properties, just click on the "Apply" button (you don't have to click on the "Keep this configuration" button that pop-ups in the dialoge-box), it will generate "$HOME/.config/monitors.xml"
• Log out from MATE. From the display manager, log into GNOME.
• As you can see, the screen resolution (1600x900 configured in MATE) not used by GNOME (https://github.com/mate-desktop/mate-control-center/assets/6416073/1b978bd7-22dd-4b42-a5b5-d32ec2d42f21), instead a fallback resolution is used.
• Run $ gnome-control-center display, change the "Resolution" to 1600x900, click on the "Apply": This will 1) move "$HOME/.config/monitors.xml" (that was generated by MATE) to "$HOME/.config/monitors-v1-backup.xml" 2) generate a new "$HOME/.config/monitors.xml" 3) Change the screen resolution directly (https://github.com/mate-desktop/mate-control-center/assets/6416073/6a841086-6936-4a21-9d43-ca1a605a9806). Close the window.

MATE does not generate a backup file of monitors.xml if you run the above steps and starting with MATE first."

MATE general version

1.26.0

Package version

1.26.0

Linux Distribution

Ubuntu 22.04 with ubuntu-mate-desktop

Link to bugreport of your Distribution (requirement)