history panel and api: if hda.peek is 'no peek' do not send peek through api and do not render peek in expanded hda

lib/galaxy/webapps/galaxy/api/history_contents.py

@@ -221,7 +221,8 @@ def get_hda_dict( trans, history, hda, for_editing ):
     hda_dict[ 'display_types' ] = get_old_display_applications( trans, hda )
 
     hda_dict[ 'visualizations' ] = hda.get_visualizations()
-    hda_dict[ 'peek' ] = to_unicode( hda.display_peek() )
+    if hda.peek and hda.peek != 'no peek':
+        hda_dict[ 'peek' ] = to_unicode( hda.display_peek() )
 
     if hda.creating_job and hda.creating_job.tool_id:
         tool_used = trans.app.toolbox.get_tool( hda.creating_job.tool_id )

static/scripts/mvc/dataset/hda-base.js

@@ -319,12 +319,13 @@ var HDABaseView = BaseView.extend( LoggableMixin ).extend(
      */
     //TODO: curr. pre-formatted into table on the server side - may not be ideal/flexible
     _render_peek : function(){
-        if( !this.model.get( 'peek' ) ){ return null; }
+        var peek = this.model.get( 'peek' );
+        if( !peek ){ return null; }
         return $( '<div/>' ).append(
             $( '<pre/>' )
                 .attr( 'id', 'peek' + this.model.get( 'id' ) )
                 .addClass( 'peek' )
-                .append( this.model.get( 'peek' ) )
+                .append( peek )
         );
     },