trackers: configure with visibility

Following the introduction of visibility parameters to todo.sr.ht.

Fixes ~sircmpwn/hub.sr.ht#75

hubsrht/blueprints/trackers.py

@@ -52,7 +52,7 @@ def new_POST(owner, project_name):
     owner, project = get_project(owner, project_name, ProjectAccess.write)
     valid = Validation(request)
     if "create" in valid:
-        remote_tracker = todo.create_tracker(owner, valid)
+        remote_tracker = todo.create_tracker(owner, valid, project.visibility)
         trackers = todo.get_trackers(owner)
         trackers = sorted(trackers, key=lambda r: r["updated"], reverse=True)
         if not valid.ok:

hubsrht/services.py

@@ -383,7 +383,7 @@ class TodoService(SrhtService):
             raise Exception(r.json())
         return r.json()
 
-    def create_tracker(self, user, valid):
+    def create_tracker(self, user, valid, visibility):
         name = valid.require("name")
         description = valid.optional("description")
         if not valid.ok:
@@ -391,6 +391,7 @@ class TodoService(SrhtService):
         return self.post(user, valid, f"{_todosrht}/api/trackers", {
             "name": name,
             "description": description,
+            "visibility": visibility.value.upper(),
         })
 
     def delete_tracker(self, user, tracker_name):

hubsrht/templates/tracker-new.html

@@ -6,9 +6,7 @@
 <div class="row">
   <form class="col-lg-8" method="POST">
     {{csrf_token()}}
-    <h3 style="margin-top: 1rem">
-      Create a new ticket tracker
-    </h3>
+    <h3>Create a new ticket tracker</h3>
     <div class="form-group">
       <label for="{{ typename }}">Name</label>
       <input