Fix issue label rendering (#13570)

* Fix issue label rendering

Prevent rendering of inactive labels and make them wrap inline.

Fixes: https://github.com/go-gitea/gitea/issues/13566

* also don't render the placeholder

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

web_src/less/_repository.less

@@ -2983,6 +2983,20 @@
   }
 }
 
+.labels.list {
+  display: flex;
+  flex-wrap: wrap;
+}
+
+.labels.list .item {
+  padding: 0 !important;
+  margin-bottom: 2px;
+}
+
+.labels.list .item + .item {
+  margin-left: 2px;
+}
+
 tbody.commit-list {
   vertical-align: baseline;
 }