Default poll interval 12 minutes

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

@@ -50,6 +50,7 @@ public class EntityAccount extends EntityOrder implements Serializable {
 
     // https://tools.ietf.org/html/rfc2177
     static final int DEFAULT_KEEP_ALIVE_INTERVAL = 24; // minutes
+    static final int DEFAULT_POLL_INTERVAL = 12; // minutes
 
     @PrimaryKey(autoGenerate = true)
     public Long id;

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

@@ -626,6 +626,8 @@ public class FragmentAccount extends FragmentBase {
             protected void onExecuted(Bundle args, CheckResult result) {
                 tvIdle.setVisibility(result.idle ? View.GONE : View.VISIBLE);
                 tvUtf8.setVisibility(result.utf8 == null || result.utf8 ? View.GONE : View.VISIBLE);
+                if (!result.idle)
+                    etInterval.setText(Integer.toString(EntityAccount.DEFAULT_POLL_INTERVAL));
                 if (result.empty)
                     cbPartialFetch.setChecked(false);