Small layout improvement

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

@@ -126,26 +126,26 @@
         style="?android:attr/buttonStyleSmall"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginStart="12dp"
+        android:layout_marginStart="6dp"
         android:layout_marginTop="12dp"
         android:drawableEnd="@drawable/twotone_close_24"
         android:drawablePadding="6dp"
         android:text="@string/title_icalendar_decline"
-        app:layout_constraintStart_toEndOf="@id/btnCalendarAccept"
-        app:layout_constraintTop_toBottomOf="@id/tvAttendees" />
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/btnCalendarAccept" />
 
     <Button
         android:id="@+id/btnCalendarMaybe"
         style="?android:attr/buttonStyleSmall"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginStart="12dp"
+        android:layout_marginStart="6dp"
         android:layout_marginTop="12dp"
         android:drawableEnd="@drawable/twotone_help_outline_24"
         android:drawablePadding="6dp"
         android:text="@string/title_icalendar_maybe"
-        app:layout_constraintStart_toEndOf="@id/btnCalendarDecline"
-        app:layout_constraintTop_toBottomOf="@id/tvAttendees" />
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/btnCalendarDecline" />
 
     <View
         android:id="@+id/paddingBottom"