Fix p5 console being cleared on pause

The p5 console was being cleared on pause
not allowing a user to view what was outputed
on the last run.  To fix clearConsole function
is now only called if playing.

Author: amitch6097

client/modules/IDE/components/PreviewFrame.jsx

@@ -334,10 +334,10 @@ class PreviewFrame extends React.Component {
   }
 
   renderSketch() {
-    this.props.clearConsole();
     const doc = this.iframeElement;
     const localFiles = this.injectLocalFiles();
     if (this.props.isPlaying) {
+      this.props.clearConsole();
       srcDoc.set(doc, localFiles);
       if (this.props.endSketchRefresh) {
         this.props.endSketchRefresh();