Fix touch bug which dropped blocks when created from an autoclosing flyout.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1743 c400ca83-b69d-9dd7-9705-49c6b8615e23
Fix double block move bug on touch screens (issue 230).

git-svn-id: http://blockly.googlecode.com/svn/trunk@1744 c400ca83-b69d-9dd7-9705-49c6b8615e23