Added optimized hint

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

@@ -99,6 +99,19 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@id/spPollInterval" />
 
+        <eu.faircode.email.FixedTextView
+            android:id="@+id/tvOptimizedHint"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="48dp"
+            android:text="@string/title_advanced_optimized_hint"
+            android:textAppearance="@style/TextAppearance.AppCompat.Small"
+            android:textColor="?attr/colorWarning"
+            android:textStyle="italic"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/tvPollHint" />
+
         <eu.faircode.email.FixedTextView
             android:id="@+id/tvExempted"
             android:layout_width="0dp"
@@ -110,7 +123,7 @@
             android:textColor="?android:attr/textColorPrimary"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/tvPollHint" />
+            app:layout_constraintTop_toBottomOf="@id/tvOptimizedHint" />
 
         <androidx.recyclerview.widget.RecyclerView
             android:id="@+id/rvExempted"

app/src/main/res/values/strings.xml

@@ -469,6 +469,7 @@
     <string name="title_advanced_enabled_hint">Globally disable or enable receiving of messages</string>
     <string name="title_advanced_manual_hint">If synchronization is disabled, it is still possible to synchronize manually by pulling down the message list.</string>
     <string name="title_advanced_poll_hint">Synchronizing periodically will compare local and remote messages each and every time, which is an expensive operation possibly resulting in extra battery usage, especially when there are a lot of messages to synchronize. Always synchronizing will avoid this by continuous monitoring for changes only.</string>
+    <string name="title_advanced_optimized_hint">This option can be optimized automatically (miscellaneous settings)</string>
     <string name="title_advanced_schedule_hint">Tap on a time to set a time</string>
     <string name="title_advanced_check_mx">Check sender email addresses on synchronizing messages</string>
     <string name="title_advanced_check_reply">Check reply email addresses on synchronizing messages</string>