Adds theme to user settings form

bookwyrm/forms.py

@@ -155,6 +155,7 @@ class EditUserForm(CustomForm):
             "discoverable",
             "preferred_timezone",
             "preferred_language",
+            "theme",
         ]
         help_texts = {f: None for f in fields}
         widgets = {

bookwyrm/templates/preferences/edit_user.html

@@ -97,6 +97,12 @@
                     {{ form.preferred_language }}
                 </div>
             </div>
+            <div class="field">
+                <label class="label" for="id_them">{% trans "Theme:" %}</label>
+                <div class="select">
+                    {{ form.theme }}
+                </div>
+            </div>
         </div>
     </section>