Until now, `_restore_gnome` was only triggered during `update-machine`.
Yet, sometimes I use this function manually, for example, whenever
I play around with Gnome's settings and extensions.
- some locations are automatically created by some programs and need
to be "fixed" from time to time
- Example: Gnome Seahorse (i.e., the passwords and keyrings application)
uses ~/.pki by default but switches to $XDG_DATA_HOME/pki if it exists
=> we move the location to make everything $XDG compliant
- the exact scripts that are run by `run-private-scripts`
is not disclosed here
- the private scripts were adjusted so that they can be run
as often as desired and always result in the same idempotent
result
- consequently, the private scripts are now always triggered
by `update-machine` as well
- unify ~/.config/shell/aliases.sh and ~/.config/shell/utils.sh
into a common ~/.config/shell/init.sh
- split the contents of ~/.config/shell/aliases.sh
into the folder ~/.config/shell/aliases.d
- split the contents of ~/.config/shell/utils.sh
into the folder ~/.config/shell/utils.d
