Fixed tabbing between inputs in a block
Used the startEditing() method

The old code was doing incorrect things for empty text fields.
Switched end condition
Fixed tabbing for blocks with nested reporters
Switched to a do…while loop
Switched to a tabbing algorithm which crosses boundaries between blocks
Made tabbing algorithm handle command blocks nested as arguments
Added importing Scratch 1.4 sprite files (.sprite)
Fixed importing some old blocks
Send key press events for scroll wheel like Scratch 1.4
Save scripts and update palette when undeleting a block or comment
Stop bolding numeric arguments
Allow holding shift to scroll horizontally with the mouse wheel
Allow switching list name in reporter from context menu
Fix overflow in procedure editor
Show slider min/max as default values in dialog
Fix small offset when adding shapes in bitmap editor
Fix pasting in bitmap editor
Show error messages when importing invalid sprites
Check built-in extension block spec translations for argument mismatches