Make all components OnPush

[jelbourn]

• MdAutocomplete
• MdAnchor
• MdButtonToggle
• MdOptgroup
• MdOption
• MdPseudoCheckbox
• MdDatepicker
• MdDialogContainer
• MdExpansionPanelHeader
• MdExpansionPanel
• MdGridList
• MdGridTile
• MdGridTileText
• MdInputContainer
• MdList
• MdListItem
• MdMenu
• MdMenuItem
• MdSpinner
• MdSelect
• MdSlider
• SimpleSnackBar
• MdSnackBarContainer
• MdTabBody
• MdTabGroup
• MdTabHeader
• MdTab
• MdTabNavBar
• TooltipComponent
• MdSidenavContainer

We should make these change incrementally, tackling one high-level component at a time (e.g., "tabs"). This will make it easier to revert in case something goes wrong after the change (and also help prevent a rebasing nightmare).

Couple of things worth noting:

• Most components should be as simple as adding OnPush to the config. This is the case if the component just has simple inputs and outputs.
• Anything that implements ControlValueAccessor needs markForCheck in the forms hooks

[alexw10]

@jelbourn just curious as to why you guys are planning to do this?

[alexciesielski]

@alexw10 OnPush is a performance setting, so the component gets only rerendered by Angular when its inputs and/or outputs change

[jelbourn]

Yeah, it helps limit the cases where change detection runs on a component.

[fxck]

#3005
#3106

related onpush issues

[z639]

and #5118

[e-cloud]

@jelbourn since there are so many components needed to be updated, your team should make the releases of Material2 more frequently, should'n you?