line nummer area not have enough size for line number for different font size

[ZhiqianYu]

As font size influence the line number font size and font size in editor, and the pad between lines.

And it also influence the width of the line number area. This cause problem when the font size is a small value, then the width of line number area is too small to display the number. e.g. When the font size is <= 16, the width of line number area is only enough for 1 digit. 2 digits number become vertical (also hidden). You need to try this starting from a small font size like 14. Cause if you try with bigger one and refresh by Metro, you cant find this problem. But when you build it, sorry, problem come.

Also, this font size influence the align problem already in the issue. It would be better if the line number width can be controlled independently. As well as line number font size and editor font size. Cause that issue is mainly about line number not align with code in editor. Especially the pad, might solve this issue.