Suppress bullet/none in plain text

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

@@ -67,6 +67,10 @@ public class BulletSpanEx extends BulletSpan {
         this.level = level;
     }
 
+    String getLType() {
+        return this.ltype;
+    }
+
     @Override
     public int getLeadingMargin(boolean first) {
         // https://issuetracker.google.com/issues/36956124

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

@@ -2164,15 +2164,19 @@ public class HtmlHelper {
                 ssb.insert(start, ns.getIndex() + ". ");
                 int level = ns.getLevel();
                 for (int l = 1; l <= level; l++)
-                    ssb.insert(start, "\t");
+                    ssb.insert(start, "  ");
             } else {
-                ssb.insert(start, "* ");
                 if (span instanceof BulletSpanEx) {
                     BulletSpanEx bs = (BulletSpanEx) span;
+
+                    if (!"none".equals(bs.getLType()))
+                        ssb.insert(start, "* ");
+
                     int level = bs.getLevel();
                     for (int l = 1; l <= level; l++)
-                        ssb.insert(start, "\t");
-                }
+                        ssb.insert(start, "  ");
+                } else
+                    ssb.insert(start, "* ");
             }
         }