AssignMainTerminal Method
Converts auxiliary terminal into main terminal.
            
            
            
            
        
            Parameters
- pTerminal
- Terminal function will be assigned the "Main terminal" property. Can't be nullor transient.
- bOverwriteEmptyPropsWithFilledProps
- If truethen properties of old main terminal that contain value are transfered to properties on new main terminal that contain no value.
- bOverwriteFilledPropsWithEmptyProps
- If truethen properties of old main terminal that contain no value removes existing properties on new main terminal.
Return Value
true if operation succeeded i.e. terminal is now main terminal, false otherwise