Add ellipses to Replace All button label

...so it's not as scary to click. Without ellipses it looks like it will replace every occurrence immediately, which
is how most "All" buttons in Find/Replace dialogs work.

@njx Seem reasonable?

@jasonsanjose I know this missed the string freeze date.  Do you think it'd be ok to land anyway, even if the change is only visible in English for now?  It seems like a worthwhile usability tweak.  (Alternatively it'd be easy to manually update the existing Fr/Ja/De translations... but I'm guessing that breaks with ALF?)