The accessible action "click" changed name to "press", adjust wrapper accordingly

The commit efb23f29 Integrate branch of IAccessible2" changed the name of the accessible action click to press
we need to adjust the action wrapper class on mac accordingly.

Change-Id: I406a44e5b4fb31f4f12859ee5380b62cc5cccdf4
Reviewed-on: https://gerrit.libreoffice.org/7932Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

vcl/osx/a11yactionwrapper.mm

@@ -30,7 +30,7 @@
 +(NSString *)nativeActionNameFor:(NSString *)actionName {
     // TODO: Optimize ?
     //       Use NSAccessibilityActionDescription
-    if ( [ actionName isEqualToString: @"click" ] ) {
+    if ( [ actionName isEqualToString: @"press" ] ) {
         return NSAccessibilityPressAction;
     } else if ( [ actionName isEqualToString: @"togglePopup" ] ) {
         return NSAccessibilityShowMenuAction;