Update schedule pages to remember where you last were

[slmnio]

Whenever you load a schedule page, it'll calculate which page to show you first. However, it'll do this every time it's mounted, so any time you go back to it. This can mean extra annoying clicks if you're trying to go to each match of the same week in the past.

A good solution would remember the last selected week of an event's page and use it the next time it is mounted instead.