Currently it is not possible to use XDG-related macros (such as
`${DOCUMENTS}`) with subpaths (such as `${DOCUMENTS}/foo`) and so
profiles just use `${HOME}` with a hardcoded path using the English
directory name and the subpath (such as `${HOME}/Documents/foo`).
Allow using subpaths after XDG macros, so that they automatically use
the auto-detected XDG path, just as when currently using the XDG macros
without subpaths.
Before:
${HOME}/Documents/foo
After:
${DOCUMENTS}/foo
This is a follow-up to #7147.
Closes#2359.
Relates to #4229.
