added term obsoletion to documentation

added obsoletion tutorial and icon to navigator.yaml

Author: thnlrd

docs/navigator.yaml

@@ -63,6 +63,11 @@ sections:
         md: PMDco User Guide.md
         icon: book-open
 
+      - title: Term Obsoletion
+        href: obsolete-ontology-terms.html
+        md: obsolete ontology terms.md
+        icon: delete
+        
       - title: Reused Ontologies
         href: reused-ontologies.html
         md: Reused ontologies.md
@@ -234,6 +239,8 @@ icons:
   settings:
     path: "M12 15a3 3 0 1 0 0-6 3 3 0 0 0 0 6z M19.4 15a1.65 1.65 0 0 0 .33 1.82l.06.06a2 2 0 0 1 0 2.83 2 2 0 0 1-2.83 0l-.06-.06a1.65 1.65 0 0 0-1.82-.33 1.65 1.65 0 0 0-1 1.51V21a2 2 0 0 1-2 2 2 2 0 0 1-2-2v-.09A1.65 1.65 0 0 0 9 19.4a1.65 1.65 0 0 0-1.82.33l-.06.06a2 2 0 0 1-2.83 0 2 2 0 0 1 0-2.83l.06-.06a1.65 1.65 0 0 0 .33-1.82 1.65 1.65 0 0 0-1.51-1H3a2 2 0 0 1-2-2 2 2 0 0 1 2-2h.09A1.65 1.65 0 0 0 4.6 9a1.65 1.65 0 0 0-.33-1.82l-.06-.06a2 2 0 0 1 0-2.83 2 2 0 0 1 2.83 0l.06.06a1.65 1.65 0 0 0 1.82.33H9a1.65 1.65 0 0 0 1-1.51V3a2 2 0 0 1 2-2 2 2 0 0 1 2 2v.09a1.65 1.65 0 0 0 1 1.51 1.65 1.65 0 0 0 1.82-.33l.06-.06a2 2 0 0 1 2.83 0 2 2 0 0 1 0 2.83l-.06.06a1.65 1.65 0 0 0-.33 1.82V9a1.65 1.65 0 0 0 1.51 1H21a2 2 0 0 1 2 2 2 2 0 0 1-2 2h-.09a1.65 1.65 0 0 0-1.51 1z"
 
+   delete:
+     path: "M21 4H8l-7 8 7 8h13a2 2 0 0 0 2-2V6a2 2 0 0 0-2-2z"
   # Search
   search:
     path: "M11 19a8 8 0 1 0 0-16 8 8 0 0 1 0 16z M21 21l-4.35-4.35"