Clear composing background

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

@@ -21,6 +21,7 @@ import static android.text.Html.TO_HTML_PARAGRAPH_LINES_CONSECUTIVE;
 import android.content.Context;
 import android.graphics.Typeface;
 import android.text.Layout;
+import android.text.Spannable;
 import android.text.SpannableStringBuilder;
 import android.text.Spanned;
 import android.text.TextDirectionHeuristics;
@@ -43,6 +44,7 @@ import android.text.style.SuperscriptSpan;
 import android.text.style.TypefaceSpan;
 import android.text.style.URLSpan;
 import android.text.style.UnderlineSpan;
+import android.view.inputmethod.BaseInputConnection;
 
 import java.lang.reflect.Array;
 import java.util.ArrayList;
@@ -76,8 +78,10 @@ public class HtmlEx {
      * @return string containing input converted to HTML
      */
     public /* static */ String toHtml(Spanned text, int option) {
-        if (!Helper.isUiThread())
+        if (!Helper.isUiThread()) {
             text = new SpannableStringBuilderEx(text);
+            BaseInputConnection.removeComposingSpans((Spannable) text);
+        }
         StringBuilder out = new StringBuilder();
         withinHtml(out, text, option);
         return out.toString();