Support wide character unicode/emoji

[lihop]

There is already support for unicode/emoji, but wide characters such as 👨 are drawn cut-off.

Expected: X👨👨X
Actual:

[lihop]

Disabling the draw_background() call shows the full emoji:

So it is successfully being detected as a wide character, but the background of the next (empty) cell is being drawn over the top.