* Use `curly_braces_in_flow_control_structures` for `material`

* include test/material

* add back removed comments

When I added localizations for shortcut keys, I added some that actually can't be shortcut keys, so I'm removing them again. These are mostly Japanese-specific keys that don't even appear on modern keyboards for the most part.

Also, added menuBarMenuLabel for an accessibility label for menu bar menus.

I modified the code for the localization generation scripts to add a --remove-undefined flag that will remove any localizations that don't appear in the canonical locale.

This change adds some localizations for keyboard keys that will be used in creating shortcut descriptions in menus.

* migrate some material files to nullsafty

* address review comments

This amends #57588 by adding code that also handles the zero license case, and adds translation strings for that.

This is a PR addressing #57226 - Proposal: New UI for Licenses Page.

This PR replaces the previous single panel license page with one that uses a master/detail flow (MDFlow) to display packages and their respective licenses.

The License Page API remains unchanged. The logic for processing the license data is kept largely the same. This PR changes how the licenses are displayed, by introducing a responsive UI using the master/detail UI pattern. For now I am calling it Master Detail Flow, or MDFlow.

MDFlow manifests as two layouts depending on the screen size. On small and medium displays, as determined by the breakpoints given by the Material Design Spec, MDFlow utilises a nested layout. On large displays, MDFlow uses a two panel (lateral) layout. MDFlow is implemented in this PR using a Navigator for the nested layout, and a Stack for the lateral layout. The master and detail views are built using builders. For the interactive component, detail pages are requested from the master view using a proxy obtained by a widget lookup on the build context; MasterDetailFlow.of(context).

This reverts commit b3c237ce.

* Add instructions for updating a localized string

* gem_missing_localizations does nothing when I test this out, seems to not be required

* Explain generation of new locale strings

* add language version 2.8 in packages/flutter

* enable non-nullable analyzer flag

Updated gen_missing_localizations to copy the english strings instead of using 'TBD' for other locales. (#57053)

Date Picker UI redesign

Adds an overflow menu to the text selection menu on Android when the items overflow.

Added a new script to generate missing localizations for use when adding new localizations to the Flutter framework.

* Update project.pbxproj files to say Flutter rather than Chromium

Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright.

* Update the copyright notice checker to require a standard notice on all files

* Update copyrights on Dart files. (This was a mechanical commit.)

* Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine.

Some were already marked "The Flutter Authors", not clear why. Their
dates have been normalized. Some were missing the blank line after the
license. Some were randomly different in trivial ways for no apparent
reason (e.g. missing the trailing period).

* Clean up the copyrights in non-Dart files. (Manual edits.)

Also, make sure templates don't have copyrights.

* Fix some more ORGANIZATIONNAMEs

Cupertino localization step 3: in-place move some material tools around to make room for cupertino (#29644)

Followup to https://github.com/flutter/website/pull/1949, as requested by @Hixie in https://github.com/flutter/website/issues/1634.

cc @kwalrath

* Make progress indicators accessible

This reverts commit 80f80ab0.

For G3 Roll:

* Revert "MaterialButton must honor its minWidth and height parameters (#22919)"

This reverts commit a0233233.

* Revert "Update uses of ButtonTheme.bar: pass along the current Theme's colorScheme (#22827)"

This reverts commit 655bf6a2.

* Revert "ButtonTheme.of().colorScheme defers to Theme (#22880)"

This reverts commit a590940e.

* Revert "Bring TextTheme into alignment with the current Material spec (#22330)"

This reverts commit 8bfb4b3e.

* Revert "Added ColorScheme, updated ThemeData, ButtonTheme, material buttons (#22013)"

This reverts commit eea3465a.

* Manual adjustments to fix reversion issues.

* enable lint unnecessary_new

* fix tests

* fix tests

* fix tests