config/html is stored in install_path/operations_gui

The new setup knows two install paths ([install_path] for program files and [appdata_path] for program data).
The OperationsGui will be stored in [install_path]/operation_gui instead of [install_path]/config/html.
Only the configuration file custom.js will be stored in [appdata_path]/config/operation_gui.
The Job Scheduler reference documentation will be stored in [install_path]/doc/(de|en)/reference instead of [install_path]/config/html/doc/(en|de).

For this two virtual directories are created in the [appdata_path]/config/scheduler.xml by the setup to

<http_server>
<!-- to find the documentations -->
<http_directory url_path = "/scheduler_home/" path = "[install_path]/"/>
<!-- to find the configuration file -->
<http_directory url_path = "/scheduler_data/" path = "[appdata_path]/"/>
</http_server>

Further the setup creates the '_html_dir' entry (section: [spooler]) in the [appdata_path]/config/factory.ini,
so that the Job Scheduler knows the new place of the OperationsGui.

[spooler]
...
; directory of the operationsGUI
html_dir = [install_path]/operations_gui
...