Minor improvement ideas

[attila123]

Hi, thanks for this nice work.
I already installed the xfce version and wanted to try how plasma works.
During running 100-display-manager-and-desktop-v1.sh the space on my / partition ran out. After solving the space problem ran the script again.
Now it failed with:

Removing xcursor-breeze to avoid conflict with breeze
error: target not found: xcursor-breeze

I commented out and ran the script again. It's a small thing, but the scripts could be improved to check for packages existence before trying to remove them.

Also I was not sure where the script failed, because it did not print the commands. I think it would be better to add 'set -x' to all your scripts, the output would be more informative.