Revised connection options

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

@@ -263,9 +263,6 @@ public class FragmentOptionsConnection extends FragmentBase implements SharedPre
             }
         });
 
-        swTcpKeepAlive.setVisibility(debug || BuildConfig.DEBUG ? View.VISIBLE : View.GONE);
-        tvTcpKeepAliveHint.setVisibility(debug || BuildConfig.DEBUG ? View.VISIBLE : View.GONE);
-
         swTcpKeepAlive.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {

app/src/main/res/layout/fragment_options_connection.xml

@@ -417,6 +417,7 @@
                     android:layout_marginEnd="48dp"
                     android:text="@string/title_advanced_tcp_keep_alive_hint"
                     android:textAppearance="@style/TextAppearance.AppCompat.Small"
+                    android:textColor="?attr/colorWarning"
                     android:textStyle="italic"
                     app:layout_constraintEnd_toEndOf="parent"
                     app:layout_constraintStart_toStartOf="parent"
@@ -440,6 +441,7 @@
                     android:layout_marginEnd="48dp"
                     android:text="@string/title_advanced_ssl_harden_hint"
                     android:textAppearance="@style/TextAppearance.AppCompat.Small"
+                    android:textColor="?attr/colorWarning"
                     android:textStyle="italic"
                     app:layout_constraintEnd_toEndOf="parent"
                     app:layout_constraintStart_toStartOf="parent"