Added FAQ

FAQ.md

@@ -179,6 +179,7 @@ FairEmail follows all the best practices for an email client as decribed in [thi
 * [(105) How does the roam-like-at-home option work?](#user-content-faq105)
 * [(106) Which launchers can show the number of new messages?](#user-content-faq106)
 * [(107) How do I used colored stars?](#user-content-faq107)
+* [(108) Can you add permanently delete messages from any folder?](#user-content-faq108)
 
 [I have another question.](#support)
 
@@ -1781,6 +1782,15 @@ However, not all servers support IMAP keywords and besides that there are no sta
 
 <br />
 
+<a name="faq108"></a>
+**(108) Can you add permanently delete messages from any folder?**
+
+When you delete messages from a folder the messages will be moved to the trash folder, so you have a chance to restore the messages.
+You can permanently delete messages from the trash folder.
+Permanently delete messages from other folders would defeat the purpose of the trash folder, so this will not be added.
+
+<br />
+
 ## Support
 
 If you have another question, want to request a feature or report a bug, you can use [this forum](https://forum.xda-developers.com/android/apps-games/source-email-t3824168).