show helper text for more than one template only

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

src/main/java/com/owncloud/android/ui/dialog/ChooseRichDocumentsTemplateDialogFragment.java

@@ -362,10 +362,11 @@ public class ChooseRichDocumentsTemplateDialogFragment extends DialogFragment im
                     if (templateList.size() == 1) {
                         fragment.onTemplateChosen(templateList.get(0));
                         fragment.binding.list.setVisibility(View.GONE);
-                        fragment.binding.helperText.setVisibility(View.INVISIBLE);
+                        fragment.binding.helperText.setVisibility(View.VISIBLE);
                     } else {
                         String name = DOT + templateList.get(0).getExtension();
                         fragment.binding.filename.setText(name);
+                        fragment.binding.helperText.setVisibility(View.VISIBLE);
                     }
 
                     fragment.setTemplateList(templateList);

src/main/java/com/owncloud/android/ui/dialog/ChooseTemplateDialogFragment.java

@@ -403,10 +403,10 @@ public class ChooseTemplateDialogFragment extends DialogFragment implements View
                     if (templateList.templates.size() == 1) {
                         fragment.onTemplateChosen(templateList.templates.values().iterator().next());
                         fragment.binding.list.setVisibility(View.GONE);
-                        fragment.binding.helperText.setVisibility(View.INVISIBLE);
                     } else {
                         String name = DOT + templateList.templates.values().iterator().next().getExtension();
                         fragment.binding.filename.setText(name);
+                        fragment.binding.helperText.setVisibility(View.VISIBLE);
                     }
 
                     fragment.setTemplateList(templateList);

src/main/res/layout/choose_template.xml

@@ -36,7 +36,8 @@
         android:paddingStart="@dimen/standard_half_padding"
         android:paddingEnd="@dimen/standard_half_padding"
         android:text="@string/choose_template_helper_text"
-        android:textColor="@color/secondary_text_color" />
+        android:textColor="@color/secondary_text_color"
+        android:visibility="invisible" />
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/list"