Updated moveLeft() to use an algorithm based on the new one for moveRight()
Updated moveLeft() to use an algorithm based on the new one for moveRight()

corinthia/corinthia-editorlib,corinthia/corinthia-editor,corinthia/corinthia-editorlib,corinthia/corinthia-editor,corinthia/corinthia-editorlib,corinthia/corinthia-editorlib,corinthia/corinthia-editor,corinthia/corinthia-editorlib,corinthia/corinthia-editor,corinthia/corinthia-editor