Added length cap to sketch name (#944)

Author: siddhant1

client/modules/IDE/components/Toolbar.jsx

@@ -124,6 +124,7 @@ class Toolbar extends React.Component {
           </a>
           <input
             type="text"
+            maxLength="256"
             className="toolbar__project-name-input"
             value={this.props.project.name}
             onChange={this.handleProjectNameChange}