Do not leave toolbar element focused.

Can lead to enter re-trigerring them
(ok, can be a feature sometimes I guess)

closes  #7475

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

@@ -102,7 +102,10 b' define(function(require){'
             icon: 'fa-cut',
             help_index : 'ee',
             handler : function (env) {
+                var index = env.notebook.get_selected_index();
                 env.notebook.cut_cell();
+                env.notebook.select(index);
+                env.notebook.focus_cell();
             }
         },
         'copy-selected-cell' : {
@@ -110,6 +113,7 b' define(function(require){'
             help_index : 'ef',
             handler : function (env) {
                 env.notebook.copy_cell();
+                env.notebook.focus_cell();
             }
         },
         'paste-cell-before' : {
@@ -257,6 +261,7 b' define(function(require){'
             help_index : 'ha',
             handler : function (env) {
                 env.notebook.kernel.interrupt();
+                env.notebook.focus_cell();
             }
         },
         'restart-kernel':{
@@ -264,6 +269,7 b' define(function(require){'
             help_index : 'hb',
             handler : function (env) {
                 env.notebook.restart_kernel();
+                env.notebook.focus_cell();
             }
         },
         'undo-last-cell-deletion' : {

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

@@ -101,6 +101,7 b' define(['
             default:
                 console.log("unrecognized cell type:", cell_type);
             }
+            that.notebook.focus_cell();
         });
         return sel;
 
@@ -123,6 +124,7 b' define(['
                     celltoolbar.CellToolbar.activate_preset(val, that.events);
                     that.notebook.metadata.celltoolbar = val;
                 }
+                that.notebook.focus_cell();
             });
         // Setup the currently registered presets.
         var presets = celltoolbar.CellToolbar.list_presets();