Fixes <https://bugs.gnu.org/36885>.
Reported by <lukasbf@tutanota.com>.
* gnu/installer/newt/page.scm (edit-file): New procedure.
(run-file-textbox-page): Add #:edit-button? and #:editor-locale
parameters. Remove 'file-text' and add 'edit-button', and add it
to the horizontal stacked grid when EXIT-BUTTON? is true. Wrap
body in 'loop'. Handle case where ARGUMENT is EDIT-BUTTON by calling
'loop'.
* gnu/installer/newt/final.scm (run-config-display-page): Add #:locale
parameter. Pass #:edit-button? and #:editor-locale to
'run-file-textbox-page'.
(run-final-page): Pass LOCALE to 'run-config-display-page'.
* gnu/installer/newt/final.scm (run-install-success-page): Return
'success.
* gnu/installer.scm (installer-program): Check the result of the 'final
step and reboot upon success.
Partly fixes <https://bugs.gnu.org/35399>.
* gnu/installer/user.scm (<user>)[password]: New field.
* gnu/installer/final.scm (%seed): New variable.
(integer->alphanumeric-char, random-string)
(create-user-database): New procedures.
(install-system): Call 'create-user-database'.
* gnu/installer/newt/final.scm (run-install-shell): Add #:users and pass
it to 'install-system'.
(run-final-page): Pass #:users to 'run-install-shell'.
* gnu/installer/newt/user.scm (run-user-add-page): Add password entry.
Pass its result as the 'password' field of <user>.
* gnu/installer/utils.scm (run-shell-command): Add #:locale and honor it.
* gnu/installer/newt/final.scm (run-install-shell): Add 'locale'
parameter; pass it to 'install-system'.
(run-final-page): Obtain locale from RESULT; pass it to 'run-install-shell'.
* gnu/installer/final.scm (install-system): Add 'locale' parameter; pass
it to 'run-shell-command'.
