Generalise render/unrender to all cells type

Allow change of behavior in pure (custom) css.

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

@@ -157,6 +157,16 b' define(['
                 that.events.trigger('command_mode.Cell', {cell: that});
             });
         }
+
+        this.element.dblclick(function () {
+            if (that.selected === false) {
+                this.events.trigger('select.Cell', {'cell':that});
+            }
+            var cont = that.unrender();
+            if (cont) {
+                that.focus_editor();
+            }
+        });
     };
     
     /**

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

@@ -288,6 +288,7 b' define(['
             delete CodeCell.msg_cells[old_msg_id];
         }
         CodeCell.msg_cells[this.last_msg_id] = this;
+        this.render();
     };
     
     /**
@@ -360,11 +361,6 b' define(['
         return cont;
     };
     
-    CodeCell.prototype.unrender = function () {
-        // CodeCell is always rendered
-        return false;
-    };
-
     CodeCell.prototype.select_all = function () {
         var start = {line: 0, ch: 0};
         var nlines = this.code_mirror.lineCount();

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

@@ -92,27 +92,6 b' define(['
     };
 
 
-    /**
-     * Bind the DOM evet to cell actions
-     * Need to be called after TextCell.create_element
-     * @private
-     * @method bind_event
-     */
-    TextCell.prototype.bind_events = function () {
-        Cell.prototype.bind_events.apply(this);
-        var that = this;
-
-        this.element.dblclick(function () {
-            if (that.selected === false) {
-                this.events.trigger('select.Cell', {'cell':that});
-            }
-            var cont = that.unrender();
-            if (cont) {
-                that.focus_editor();
-            }
-        });
-    };
-
     // Cell level actions
     
     TextCell.prototype.select = function () {