Drag & Drop to create query

SQLDeveloper keeps amazing me. I can easily create a query by merely selecting columns I need on the left pane and drop it in the SQL Window to create a query. Here are the steps I followed to create a query
(I have already created a connection and been able to successfully connect to SQLDeveloper, organized the logins into folders). The initial screen will look like Screen -1

Screen-1

Open a New SQLWorkSheet by clicking on the SQL ICON (Screen-2)

Screen-2

A popup window will open up (Screen -3)

Screen-3

Select the columns you need (either by pressing SHIFT and Left Mouse Click or (as I did) CTRL+ Left Mouse click) and drag them into the SQL Window (Screen -4)

Screen-4

result is displayed as shown in Screen -5.

Bug-01: There is a minor bug in this version (2.1.1.64). Let us say there is a query already existing the query window like above. You click on the left pane to select a few columns; Drag them into SQL Window and a popup window appears, where you would have to choose amongst "Insert/Delete..." and after making your selections, instead of clicking on apply, you change your mind and click on "cancel", the query still gets copied to the SQL Window (Screen-6a, Screen-6b)

Screen-6a

Screen-6b

Note: This does not happen if there is no query in the SQL Window
Bug-02: Selecting "Join" has no effect.
SQLDeveloper is an excellent product. Would like to see it even better.