"Top 10..." misses the option to enter different values;
changed top "Top N..."

Change-Id: I919fe48cce08ddd52a5f7246b77853c1b8c14253
Reviewed-on: https://gerrit.libreoffice.org/58052
Tested-by: Jenkins
Reviewed-by: Heiko Tietze <tietze.heiko@gmail.com>