Insert new lines before non block elements

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

@@ -639,6 +639,10 @@ public class HtmlHelper {
 
         // Selective new lines
         for (Element div : document.select("div")) {
+            Node prev = div.previousSibling();
+            if (prev instanceof Element && !((Element) prev).isBlock())
+                div.prependElement("br");
+
             boolean inline = Boolean.parseBoolean(div.attr("inline"));
             int childs = div.childNodeSize();
             Node last = (childs > 0 ? div.childNode(childs - 1) : null);