Comment 4 for bug 519834

Just found out what the problem is. When we click on the line in error info pane the cursor in editor gets placed at appropriate line. Hence the the line number is shown in bold. The reason cursor is not visible is because editor component does not have focus. If you use TAB key to put focus on editor component again the cursor becomes visible.

As suggested by Sridhar, we could use line highlight always. But as of now we specifically use line highlight during debug mode. So always highlighting line could be confusing to users.