chore(translate): update Dutch

Currently translated at 95.5% (232 of 243 strings)
Translation: SimpleEmail/Translations
Translate-URL: https://hosted.weblate.org/projects/simple-email/translations/nl/

app/src/main/res/values-nl/strings.xml

@@ -1,7 +1,6 @@
-<?xml version="1.0" encoding="utf-8"?>
-
+<?xml version='1.0' encoding='UTF-8'?>
 <resources>
-  <string name="app_copyright">Copyright &#x24B8; 2018 door M. Bokhorst</string>
+  <string name="app_copyright">Copyright Ⓒ 2018 door M. Bokhorst</string>
   <string name="channel_service">Service</string>
   <string name="channel_notification">Meldingen</string>
   <string name="channel_error">Fouten</string>
@@ -71,7 +70,7 @@
   <string name="title_advanced_swipe">Veegacties</string>
   <string name="title_advanced_compact">Compacte berichtweergave</string>
   <string name="title_advanced_debug">Foutopsporing modus</string>
-  <string name="title_select">Selecteer &#8230;</string>
+  <string name="title_select">Selecteer …</string>
   <string name="title_identity_name">Uw naam</string>
   <string name="title_identity_email">Uw e-mailadres</string>
   <string name="title_identity_reply_to">Antwoord op adres</string>
@@ -95,7 +94,7 @@
   <string name="title_user">Gebruikersnaam</string>
   <string name="title_password">Wachtwoord</string>
   <string name="title_authorize">Selecteer account</string>
-  <string name="title_authorizing">Account autoriseren &#8230;</string>
+  <string name="title_authorizing">Account autoriseren …</string>
   <string name="title_setup_advanced">Geavanceerd</string>
   <string name="title_store_sent">Bewaar verzonden berichten (normaliter niet nodig)</string>
   <string name="title_synchronize_account">Synchroniseren (ontvang berichten)</string>