Add 1.4.6 release notes

Author: arteymix

docs/release-notes.md

@@ -1,5 +1,14 @@
 # Release Notes
 
+## 1.4.6
+
+This release has a few fixes that provide better user feedback during registration and while updating the user profile.
+
+Fix deletion of user in the administrative section. Its associated tokens were somehow set to `NULL` by Hibernate before
+being deleted.
+
+Hide research focus in the user profile if nothing has been entered.
+
 ## 1.4.5
 
 This release resolves an issue with slow SMTP servers causing a proxy timeout by sending emails asynchronously.