Make project tags optional

Didn't notice this in the original patchset

hubsrht/blueprints/projects.py

@@ -147,7 +147,7 @@ def create_POST():
     valid = Validation(request)
     name = valid.require("name")
     description = valid.require("description")
-    raw_tags = valid.require("tags")
+    raw_tags = valid.optional("tags")
     visibility = valid.require("visibility", cls=Visibility)
     valid.expect(not name or len(name) < 128,
             "Name must be fewer than 128 characters", field="name")
@@ -191,7 +191,7 @@ def config_POST(owner, project_name):
 
     valid = Validation(request)
     description = valid.require("description")
-    tags = _verify_tags(valid, valid.require("tags"))
+    tags = _verify_tags(valid, valid.optional("tags"))
     website = valid.optional("website")
     visibility = valid.require("visibility", cls=Visibility)
     valid.expect(not website or valid_url(website),

hubsrht/templates/project-config.html

@@ -41,8 +41,7 @@
                 id="tags"
                 name="tags"
                 placeholder="Up to three comma-separated topics"
-                value="{{tags or ", ".join(project.tags)}}"
-                required />
+                value="{{tags or ", ".join(project.tags)}}" />
               {{valid.summary("tags")}}
             </div>
             <div class="form-group">

hubsrht/templates/project-create.html

@@ -51,7 +51,6 @@
         name="tags"
         class="form-control {{valid.cls("tags")}}"
         placeholder="Up to three comma-separated topics"
-        required
         value="{{", ".join(tags) or ""}}" />
       {{valid.summary("tags")}}
     </div>