Disable autocomplete for the conversation form recipient input

closes #7375

Changelog.md

@@ -7,6 +7,7 @@
 
 ## Bug fixes
 * Don't hide posts when blocking someone from the profile [#7379](https://github.com/diaspora/diaspora/pull/7379)
+* Disable autocomplete for the conversation form recipient input [#7375](https://github.com/diaspora/diaspora/pull/7375)
 
 ## Features
 * Add links to liked and commented pages [#5502](https://github.com/diaspora/diaspora/pull/5502)

app/views/conversations/_new.haml

@@ -4,7 +4,12 @@
     .form-group
       %label#to-label{for: "contacts-search-input"}= t(".to")
       .recipients-tag-list.clearfix#recipients-tag-list
-      = text_field_tag "contact_autocomplete", nil, id: "contacts-search-input", class: "form-control"
+      = text_field_tag "contact_autocomplete",
+                       nil,
+                       id: "contacts-search-input",
+                       class: "form-control",
+                       autocomplete: "off"
+
       - unless defined?(mobile) && mobile
         = text_field_tag "person_ids", nil, id: "contact-ids", type: "hidden",
                                             aria: {labelledby: "to-label"}