fdo#70998 Use "Insert Image" in dialog as well

Change-Id: I598c7367806a88cd4e582333c1e2fc8b984333e5
Reviewed-on: https://gerrit.libreoffice.org/6561Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

sd/source/ui/app/strings.src

@@ -118,7 +118,7 @@ String STR_UNDO_DRAGDROP
 };
 String STR_INSERTGRAPHIC
 {
-    Text [ en-US ] = "Insert picture" ;
+    Text [ en-US ] = "Insert Image" ;
 };
 String STR_SLOW
 {