feat(uiScrollView) scroll page when ui-view is loaded

Replaces `$anchorScroll` call in `uiView` with a custom provider
which scrolls the element attached to `uiView` into the current
view instead. This should allow a finer default for designer by
scrolling automatically to the activate `uiView` without
manipulating anchors.

Calling `$uiViewScrollProvider.useAnchorScroll()` will restore the
current behavior or calling `$anchorScroll` instead.