Missing @since tags

...after 8cc8ffdb "[API CHANGE] Add PopupRequest
- a callback to open a pop-up win. in calc"

Change-Id: I94be25141fdc415c8cc45c8a2f1be9ee69d23f2c

offapi/com/sun/star/chart2/data/PopupRequest.idl

@@ -24,7 +24,7 @@ module chart2
 module data
 {
 
-/**
+/** @since LibreOffice 5.4
  */
 service PopupRequest
 {

offapi/com/sun/star/chart2/data/XDataReceiver.idl

@@ -89,6 +89,8 @@ interface XDataReceiver : ::com::sun::star::uno::XInterface
     XRangeHighlighter getRangeHighlighter();
 
     /** A callback object to execute a foreign popup menu window.
+
+        @since LibreOffice 5.4
     */
     XPopupRequest getPopupRequest();
 };