Server or Bartender must not View Others Checks

A server or bartender must be unable to view others' checks in BarTab screen without explicitly allowing this through a system setting.

Currently, a server looking at a table map would certainly see tables that didn’t belong to them but could not open the table. However, for BarTab one bartender MUST not be able to “See” other tabs listed on his or her screen.

The requirement is to make it so that only one person's checks who has signed it at the POS appears when using the BarTab screen.