* replace child parameter with builder on showDialog
* change builder parameter to WidgetBuilder
* mark child as deprecated and expand documentation to cover this and how builder should be used
* tidy comments and address some feedback
* phrasing
* move space to prev line and add //ignore comments for deprecated member use
* address comments and fix it's its
* update code samples
* adds semicolon to code snippets
Fixes#13743Fixes#12379
Follow-up to #13745
Also adds an option to hide gestures introduced by `InkWell` and `InkResponse` from the semantics tree (see also `GestureDetector.excludeFromSemantics`).
Previously, we used `Alignment`, which was difficult to understand. Now,
we just use an `Offset` scaled to the child's size, which is much easier
to understand.
* Add cupertino to gallery and add CupertinoButto
* Use single quotes
* Add disabled state
* Some review notes
* Make button animation more responsive and tweak timing
* Renamed things Cupertino
* Button with background, move cupertino demos, move material demos
* Move 2 level list too
* Refactor various demo route names
* Some review notes
* More reviews and add test
* Linter as
* Move private constant up
