Description of the new feature/enhancement

The cursor position is not rendered correctly when using a font whose font width of Japanese character is not half as that of Alphabet.

And This probably happen not in not only Japanese but also another language (eg. Chinese).

In this picture, Japanese font width : Alphabet font width is 5 : 3 (not 2 : 1)

Sorry if this issue has already been posted.

Proposed technical implementation details (optional)