People get confused by the tight constraints.

Based on P5's experience

Fixes https://github.com/flutter/flutter/issues/6628

Closes https://github.com/flutter/flutter/issues/5781

I think we must have accidentally checked this in some time.

Closes https://github.com/flutter/flutter/issues/6125

Closes https://github.com/flutter/flutter/issues/6141

Closes https://github.com/flutter/flutter/issues/5743

Closes https://github.com/flutter/flutter/issues/5617

* make showElapsedTime default to true

* support nested progresses

* improve hot reload message

* rethrow

- [x] Remove the second full-sync on startup.
- [x] Always invoke the snapshotter to determine the minimal set of Dart sources used.
- [x] Only synchronize the *used* Dart sources to DevFS.
- [x] Detect syntax / file missing errors on the host and gate reloads / restarts.

On Android and Fuchsia, default to Roboto. On iOS, use San Francisco.

This is causing issues when integratting Flutter into GN as the
generated depfile refers to snapshot as the target instead of the
bundle. We instead use a separate GN action to generate the
snapshot use the Flutter compiler to only assemble the bundle.

* add flutter run --machine flag
* refactor daemon stdin/out command stream/response
* extract daemon startApp method
* refactor flutter run --machine to call daemon.startApp

* merge `flutter skia` into `flutter screenshot`
* improve skia failed error message
* update help text - how to find diagnostic port for skia
* improve error message if skia capture fails

FormField is now a widget that can contain any type of field. Input no
longer has special code to handle form fields. Instead, there is a
helper widget InputFormField for using an Input inside a FormField.

Fixes https://github.com/flutter/flutter/issues/6097 and based on
feedback from the same.

* Fix Missing newline in flutter run help
Issue #6461

* Fix overtab from multiline

Fixes https://github.com/flutter/flutter/issues/6280

Fixes #6417