Comment 3 for bug 1464407

Basically, the common way to display week number is placing week number column in the left side next to first day of week.
Seems there is no much space to display icon,especially in yearly view.So I have a quick fixing to only display text in monthly view and yearly view.
For monthly view: Wk+number
For yearly view: W+number (since there is no enough space to put 4 characters at most,such as Wk31, so I only display one leading characters).
Plz check screenshots for details.

PS: Also I think there might be a way to disable weeknumber display somehow, so a checkbox for this in settings page can be considered.