Add deltachat credentials page with QR code, update translation strings

app/templates/deltachat_creds.html

@@ -0,0 +1,24 @@
+{% extends "base.html" %}
+
+{% block content %}
+    <h1 class="title is-large butter-title">{{ _('Secure Messenger Account') }}</h1>
+
+
+<div class="block">
+<div class="block">
+<p>{{ _('Scan the following QR code with a device where DeltaChat is installed:') }}</p>
+</div>
+    <img src="{{ base64img }}"/>
+</div>
+<div class="block">
+    <div class="block"><p class="">{{ _('If your device does not have a camera, select "Create new profile" in DeltaChat, choose "Use Other Server" and find "Paste from clipboard", to paste the following link') }}:</p></div>
+    <pre>{{ dclink}}</pre>
+</div>
+
+    <div class="block"></div>
+<form action="{{ url_for('deltachat_credentials') }}" method="post">
+    <button type="submit" class="button is-link is-fullwidth block">
+        <p>{{ _("Generate new credentials") }} </p>
+    </button>
+ </form>
+{% endblock %}

app/templates/messaging.html

@@ -4,14 +4,14 @@
     <h1 class="title is-large butter-title">{{ _('Secure Messenger') }}</h1>
 
 <div class="block">
-    <p> {{ _("To use secure messaging, install Delta Chat and then return to this page to create your local offline account.")}}</p>
+    <p> {{ _("To use secure messaging, install Delta Chat and then create your local offline account.")}}</p>
 </div>
     <a href="{{ url_for('static', filename='DeltaChat_2.35.0_APKPure.apk') }}"><button class="button is-link is-fullwidth block">
         <p>{{ _("Step 1") }}<br> {{ _("Download and install") }}</p>
     </button>
     </a>
     <div class="block"></div>
-<form action="{{ url_for('generate_random_deltachat_credentials') }}" method="post">
+<form action="{{ url_for('deltachat_credentials') }}" method="post">
     <button type="submit" class="button is-link is-fullwidth block">
         <p>{{ _("Step 2") }} <br> {{ _("Create offline account") }} </p>
     </button>