Release of minor versions of classical Abacre Point of Sale products

Released:

Abacre Restaurant Point of Sale v13.7
Abacre Retail Point of Sale v12.7
Abacre Hotel Management System v10.7
Abacre Cash Register v9.7
Abacre Inventory Management and Control v9.7

The list of changes:

* Feature: added custom fields for client.
* Feature: for modifiers it's now possible to change positions and colors. Watch the video:
https://youtu.be/WlxqZelm0rw
* Feature: on Choose Modifiers window added a possibility to view list of modifiers as buttons. Watch the video:
https://youtu.be/dzjZmIHZIsI
* Feature: added new security role: Hide closed orders.
* Feature: added new {$datapath} bill and invoice configuration parameter.
* Feature: inventory shrinkage report has now stock locations filter.
* Bug fixed: barcodes for KSA were printed with incorrect time zone offset.
* Bug fixed: corrected bug with modifiers template tags for bill and notification printers.
* Bug fixed: worker login name defined by {$server} tag was printed incorrectly when "Login by password only" method was used.