* Use `curly_braces_in_flow_control_structures` for `widgets`

* fix comments

* fix comments

* Support global selection

* addressing comments

* add new test

* Addressing review comments

* update

* addressing comments

* addressing comments

* Addressing comments

* fix build

* ++

* ++

* ++

* ++

* codereview feedback

* ++

* migrates lib/foundation and lib/widgets

* migrates lib/painting and lib/material

* migrates lib/cupertino, lib/gestures, lib/services, lib/semantics and lib/rendering

* fixes failing tests

* migrates test/

* improves hashing of lists

* Modularize ReorderableListView auto scrolling logic

* comment

* fix test

* addressing comment

This reverts commit d056500b.

This reverts commit 31de052e.

This reverts commit e2490f29.

prototypeItem added to ReorderableList and ReorderableListView along with tests

This reverts commit 437ff210.

Added constructor parameters to the ReorderableList that were missing from ScrollView. Also replace a lot of doc comments with macro templates to reduce duplication.