sets the value of a project setting.
| Parameter | Description | 
|---|---|
| Project | fullname of the target project. When empty the currently selected project is used.  | 
| set | name of the project setting to set  | 
| index | optional index of setting.if missing, then 0 is used  | 
| value | new value of setting  | 
See also "XAfActionSetting" to change other than project settings