Work Progress - Feb 23 - Mar 1

* Users can now drag a codelet even if we have a textfield underneath it in the scriptlet panel. (ref)
* Fix the bug that the background object appears twice in the applet version at the beginning.
* The representation of object properties has been changed: a label for each property instead of a pull-down menu.
* Textfield for number/string input is now the default entry for the method codelet, assignment codelet, etc. User can no longer pull the textfield away. Such a behavior is similar to what we have in MIT Scratch.

TODO:
* We should record the layers where each event codelet is currently located in the scriptlet panel. Otherwise we may not be able to reproduce the exact original layout when we reload the scriplet panel.

Work Progress - Feb 16 - Feb 22

Check "SB in Beta" link above for a demo

Work done
* fix the ghost codelet bug (Go to "Expressions" tab, dragging on the red area of an expression codelet no longer creates a ghost codelet.)
* If-Then-Else control codelet is now available (Go to "Control" tab)

Work Progress - Feb 9 - Feb 15

See "SB in beta link" above for a demo.

Work done
* The width of parameter-less method codelet is now correct when attached to an event codelet without any other method codelet.
* Core: The binary expressions in ExpressionManager now have default LHS and RHS.
* Core: Get rid of script shown in the left JPnlEventManager panel
* Core: Fix the blinky codelet problem
* Still working: allow drag of codelet if it is above some TextField (not easy, but essential)

Work Progress - Feb 2 - Feb 8

* Change the behavior when a codelet is dragged over another codelet in the scriptlet window:
1) If there is a legitimate place to put the codelet, it should highlight, but if there is none, and you release it, it hovers.
2) If it highlights, and you release it, it will attach to that highlight.
* Fix bugs on insertion position highlighting and codelet insertion (previously, if there are more than one event codelets in the scriptlet window, we may not be able to insert method codelet.)
* Fix the bug that the selection area of the event codelet grows in tandem with the invisible y-slack size (abolish yslackarea)
* Fix the bug that the selected codelet(s) disappear in the scriptlet window by a click-and-release action (w/o drag)
* Properly clear the previous insertion position highlight
* The rectangular insertion highlights for box insertion points (like the conditional block of IF) are now displayed without improper displacement.
* Show error message if the invalid property is selected.

* Highlight the problematic object in property panel?