New INFLD/GUI feature: "placeholders" or "cues". These are short messages that appear inside an INFLD/EDIT control when the control is otherwise empty. They are useful for giving the user tips as to what the field would or should contain, without requiring additional screen real estate for labels/prompts or user action to display a tooltip.
To specify a placeholder, embed it at the start of the tooltip string, enclosed in [brackets]. Note that INFLD tooltips are defined within the hlpidx parameter, starting with ">", for example:
hlpidx$ = ">[tax id]For businesses use the employer id~VK_xF123"
Compatibility: No dependency on the server version. Requires client 6.1.1419 to recognize the placeholder; older clients will treat it as part of the tooltip (which should be harmless).
