Add counting of detached nodes

static/graph.toml

@@ -539,10 +539,9 @@ text = """
         - [ ] Example (implies metadata `has_example`)
         - [ ] References/influences (implies metadata `has_references`)
 - [ ] Meta-awareness
-    - [ ] Detached edges
+    - [x] Detached edges
     - [ ] Most linked to nodes
     - [ ] Most linked from nodes
-    - [ ] Most linked to nonexistent nodes
     - [ ] Most linked
 - [ ] Rendering
     - [ ] Sorting of tree, index list and drop-down navigation

static/style.css

@@ -163,6 +163,17 @@ em#index-node-count {
     font-size: 0.8em;
 }
 
+table {
+  margin: auto;
+  border-collapse: collapse;
+  border: 0.5px dotted #666;
+}
+
+td, th {
+    padding: 10px;
+    border: 0.5px dotted #666;
+}
+
 @media (prefers-color-scheme: dark) {
     * {
         background-color: #222222;