Remove CID on converting inline image to attachment

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

@@ -115,10 +115,10 @@ public interface DaoAttachment {
     void setType(long id, String type);
 
     @Query("UPDATE attachment" +
-            " SET disposition = :disposition" +
+            " SET disposition = :disposition, cid = :cid" +
             " WHERE id = :id" +
-            " AND NOT (disposition IS :disposition)")
+            " AND NOT (disposition IS :disposition AND cid IS :cid)")
-    void setDisposition(long id, String disposition);
+    void setDisposition(long id, String disposition, String cid);
 
     @Query("UPDATE attachment" +
             " SET cid = :cid" +

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

@@ -5769,7 +5769,8 @@ public class FragmentCompose extends FragmentBase {
                                 if (attachment.isInline() && attachment.isImage()) {
                                     Log.i("Converting to attachment cid=" + attachment.cid);
                                     attachment.disposition = Part.ATTACHMENT;
-                                    db.attachment().setDisposition(attachment.id, attachment.disposition);
+                                    attachment.cid = null;
+                                    db.attachment().setDisposition(attachment.id, attachment.disposition, attachment.cid);
                                     dirty = true;
                                 }
                         }