Bring in latest xterm.css changes

Part of #27096

src/vs/workbench/parts/terminal/electron-browser/media/xterm.css

@@ -143,7 +143,8 @@
 	overflow-y: scroll;
 }
 
-.terminal .xterm-wide-char {
+.terminal .xterm-wide-char,
+.terminal .xterm-normal-char  {
 	display: inline-block;
 }