Adds CLI hooks (IDs) to certain elements (#592)

* Adds CLI hooks (ids) to certain elements

* Update Carbon.js

* Update ExportMenu.js

components/Carbon.js

@@ -242,7 +242,7 @@ class Carbon extends React.PureComponent {
 
     return (
       <div className="section">
-        <div className="export-container" ref={this.getRef}>
+        <div className="export-container" ref={this.getRef} id="export-container">
           {content}
           <div className="twitter-png-fix" />
         </div>

components/ExportMenu.js

@@ -37,7 +37,7 @@ class ExportMenu extends React.PureComponent {
     const { isVisible } = this.state
 
     return (
-      <div className="export-container">
+      <div className="export-container" id="export-menu">
         <Button
           selected={isVisible}
           className="exportButton"
@@ -85,10 +85,10 @@ class ExportMenu extends React.PureComponent {
             <div className="save-container">
               <span>Save as</span>
               <div>
-                <button onClick={this.handleExport('png')} className="save-button">
+                <button onClick={this.handleExport('png')} className="save-button" id="export-png">
                   PNG
                 </button>
-                <button onClick={this.handleExport('svg')} className="save-button">
+                <button onClick={this.handleExport('svg')} className="save-button" id="export-svg">
                   SVG
                 </button>
               </div>