Mobile UI actions support back navigation when a UI action finishes. You can navigate
back one logical navigation item in the current navigation stack.
When the navigate_back flag is set to true for a mobile UI action in the
UI Action - Mobile [sys_ui_ng_action] table, you can move back to the previous screen.
Sometimes one or more discrete screens, or a nested or partial view of the screen, can
represent a single navigation item. For this reason, back navigation can result in different UI
behaviors depending on the current navigation content or device.
For example, the activity stream and form for a record are considered as one logical navigation
item (the current record). However, some devices use multiple discrete screens for this
navigation. When back navigation is triggered from a UI action on a form, multiple screens may be
dismissed to return to a previous item, such as a list.
Note: Setting a redirect on the UI action through action.setRedirectURL();
takes precedence over the navigate_back flag.