Version 2.1.2 release

• [Requirement] Move selected area via drag and drop
• [Requirement] Improve the selection for special element, such as: BUTTON, IMG
• [Bug] Visual view: Switch file does not work in some case
• [Bug] Cursor does not move to right position in some case
• [Bug] Selection is wrong when select elements of include files

For more information about drag and drop support, please view this page.