# select `simple` theme
# change `index.tpl` of this theme - add `button_title="la_Yes"` attribute to `<inp2:st_ContentBlock num="1"/>` tag in this file
# go to {nav Website & Content > Browse Website}, click on `Content Mode` tab
# confirm that on page in `Content Mode` button `Yes` is shown
# change `index.tpl` of `simple` theme - set empty value for existing `button_title` attribute
# confirm that on page in `Content Mode` `Edit Content` button has default title