Remove Spark signatures

app/src/main/java/eu/faircode/email/HtmlHelper.java

@@ -2754,6 +2754,9 @@ public class HtmlHelper {
         // Yahoo/Android: <div id="ymail_android_signature">
         d.body().select("div#ymail_android_signature").remove();
 
+        // Spark: <div name="messageSignatureSection">
+        d.body().select("div[name=messageSignatureSection]").remove();
+
         // Apple: <br id="lineBreakAtBeginningOfSignature"> <div dir="ltr">
         for (Element br : d.body().select("br#lineBreakAtBeginningOfSignature")) {
             Element next = br.nextElementSibling();