[Calendar] Scrolling in Week view is confusing

Steps to reproduce:

* Switch to Week view
* scroll a few pages to left, it will either scroll inside the week or scroll to the next week, depending on the weekday it is.
* now turn around and scroll the other side. Again it'll switch either to the next week or scroll inside the week

The confusing things now are that going a few weeks left behaves different than going to the right. Because of this, scrolling in one direction is slower than scrolling to the other. Also as a user I somehow have a mental model of the things I've just scrolled past. Reversing my input should go back the same way as it came.

An additional issue is that if you pass the current day, the current week will behave differently than all the other weeks, even if scrolling the same direction. This only happens on Wednesday - Sunday, when the current day is on the right end of the week.

IMO, instead the the weeks should always be initialized so that the has to scroll through the complete week before switching to the next/previous week.

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UX Comment:

A quick check indicates that this behaviour feels a little strange and that the right-swipes (in week view) should always be initialised so that the user scrolls through the complete week before switching to the previous week (as when using left-swipes to navigate to the next week).

i.e. When left swiping from Monday, the week-divider is shown (as currently implemented) but the next day shown is the Sunday of the preceding week.