Added remark

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

@@ -35,6 +35,7 @@ public class FragmentDialogContactDelete extends FragmentDialogBase {
         return new AlertDialog.Builder(getContext())
                 .setIcon(R.drawable.twotone_warning_24)
                 .setTitle(getString(R.string.title_delete_contacts))
+                .setMessage(getString(R.string.title_delete_contacts_remark))
                 .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                     @Override
                     public void onClick(DialogInterface dialog, int which) {

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

@@ -1380,7 +1380,8 @@
     <string name="title_delete_operation_flag">Flag operations</string>
     <string name="title_delete_operation_delete">Delete operations</string>
     <string name="title_delete_operation_deleted">%1$d operations deleted</string>
-    <string name="title_delete_contacts">Delete visible local contacts?</string>
+    <string name="title_delete_contacts">Delete all local contacts?</string>
+    <string name="title_delete_contacts_remark">All contacts shown and not shown will be deleted, even if searched!</string>
     <string name="title_no_operations">No pending operations</string>
     <string name="title_check_operations">Checking for operations</string>
     <string name="title_hint_operations">Deleting operations can result in disappearing messages and synchronization problems</string>