scripted-diff: Make translation bilingual

-BEGIN VERIFY SCRIPT-
sed -i 's/inline std::string _(const char\* psz)/inline bilingual_str _(const char\* psz)/' src/util/translation.h
sed -i 's/return G_TRANSLATION_FUN ? (G_TRANSLATION_FUN)(psz) : psz;/return bilingual_str{psz, G_TRANSLATION_FUN ? (G_TRANSLATION_FUN)(psz) : psz};/' src/util/translation.h
sed -i 's/\b_("\([^"]\|\\"\)*")/&.translated/g' $(git grep --files-with-matches '\b_("' src)
echo Hard cases - multiline strings.
sed -i 's/"Visit %s for further information about the software.")/&.translated/g' src/init.cpp
sed -i "s/\"Only rebuild the block database if you are sure that your computer's date and time are correct\")/&.translated/g" src/init.cpp
sed -i 's/" restore from a backup.")/&.translated/g' src/wallet/db.cpp
sed -i 's/" or address book entries might be missing or incorrect.")/&.translated/g' src/wallet/wallet.cpp
echo Special case.
sed -i 's/_(COPYRIGHT_HOLDERS)/&.translated/' src/util/system.cpp test/lint/lint-format-strings.py
-END VERIFY SCRIPT-

src/qt/splashscreen.cpp

@@ -168,8 +168,8 @@ static void InitMessage(SplashScreen *splash, const std::string &message)
 static void ShowProgress(SplashScreen *splash, const std::string &title, int nProgress, bool resume_possible)
 {
     InitMessage(splash, title + std::string("\n") +
-            (resume_possible ? _("(press q to shutdown and continue later)")
-                                : _("press q to shutdown")) +
+            (resume_possible ? _("(press q to shutdown and continue later)").translated
+                                : _("press q to shutdown").translated) +
             strprintf("\n%d", nProgress) + "%");
 }
 #ifdef ENABLE_WALLET