Merge branch 'release-4.2.4' into CAKE-345-batch-sending

# Conflicts: # lib/bitcoin/electrum_wallet.dart # lib/src/screens/send/send_page.dart # lib/src/screens/send/send_template_page.dart # lib/view_model/send/send_view_model.dart # res/values/strings_de.arb # res/values/strings_en.arb # res/values/strings_es.arb # res/values/strings_hi.arb # res/values/strings_hr.arb # res/values/strings_it.arb # res/values/strings_ja.arb # res/values/strings_ko.arb # res/values/strings_nl.arb # res/values/strings_pl.arb # res/values/strings_pt.arb # res/values/strings_ru.arb # res/values/strings_uk.arb # res/values/strings_zh.arb