Added hint that grouping by date requires sorting on time

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

@@ -68,6 +68,18 @@
             app:layout_constraintTop_toBottomOf="@id/swCards"
             app:switchPadding="12dp" />
 
+        <TextView
+            android:id="@+id/tvDateHint"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="48dp"
+            android:text="@string/title_advanced_date_hint"
+            android:textAppearance="@style/TextAppearance.AppCompat.Small"
+            android:textStyle="italic"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/swDate" />
+
         <androidx.appcompat.widget.SwitchCompat
             android:id="@+id/swThreading"
             android:layout_width="0dp"
@@ -77,7 +89,7 @@
             android:text="@string/title_advanced_threading"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/swDate"
+            app:layout_constraintTop_toBottomOf="@id/tvDateHint"
             app:switchPadding="12dp" />
 
         <TextView

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

@@ -329,6 +329,7 @@
     <string name="title_advanced_roaming_hint">Messages headers will always be fetched when roaming. You can use the device\'s roaming setting to disable internet while roaming.</string>
 
     <string name="title_advanced_browse_hint">Fetch more messages when scrolling down</string>
+    <string name="title_advanced_date_hint">Messages will be grouped by date only if messages are being sorted on time</string>
     <string name="title_advanced_threading_hint">Group messages related to each other</string>
     <string name="title_advanced_name_email_hint">When disabled only names will be shown when available</string>
     <string name="title_advanced_preview_hint">Only available when message text has been downloaded</string>