Merge pull request #4569 from minrk/persist-celltoolbar

store cell toolbar preset in notebook metadata

IPython/html/static/notebook/js/maintoolbar.js

@@ -147,9 +147,11 b' var IPython = (function (IPython) {'
                 var val = $(this).val()
                 if (val =='') {
                     IPython.CellToolbar.global_hide();
+                    delete IPython.notebook.metadata.celltoolbar;
                 } else {
                     IPython.CellToolbar.global_show();
                     IPython.CellToolbar.activate_preset(val);
+                    IPython.notebook.metadata.celltoolbar = val;
                 }
             });
         // Setup the currently registered presets.

IPython/html/static/notebook/js/notebook.js

@@ -1958,7 +1958,14 b' var IPython = (function (IPython) {'
             this.start_session();
         }
         // load our checkpoint list
-        IPython.notebook.list_checkpoints();
+        this.list_checkpoints();
+        
+        // load toolbar state
+        if (this.metadata.celltoolbar) {
+            IPython.CellToolbar.global_show();
+            IPython.CellToolbar.activate_preset(this.metadata.celltoolbar);
+        }
+        
         $([IPython.events]).trigger('notebook_loaded.Notebook');
     };