It can be done, but maybe not so easily. When the Action button for submitting a bug from the Manual Runner is clicked, save the text from the steps until the current one to text file on the PC or as a user setting in the database. Then concatenate the contents to the Description field in Bug_New, and remove the file/setting.
As always when manipulating the memo field contents from the workflow you also need to take the HTML tags into account.
As always when manipulating the memo field contents from the workflow you also need to take the HTML tags into account.