SQL Developer's "SQL History"

I love the SQL History button (F8) in SQL Developer. Let me tell you what happened to me yesterday. I using SQL Developer to work on a difficult SELECT statement when the electricity at work went out on me. Poof my SELECT statement was gone, right? Not in SQL Developer. When everything came up I started SQL Developer, opened a SQL Worksheet, and clicked on the SQL History button . There was my SELECT statement.

Thanks Oracle for the button.