* Update doc header in Opacity class to fix issue #23311

* Added slider with editable numerical value to gallery. Fixes flutter#1542

* Revert "Update doc header in Opacity class to fix issue #23311"

This reverts commit 2d3642bbda6e00389e78631360f8274e9bb7d675.

* Fix typo in slider description

* Increase TextField size to pass accessibility test

* Added Semantics widget to pass accessibility test

* Made description start with caps to match other examples

* Removed unnecessary spacing Container widget

* Update authors file

* Fix indent

* Removed decimal and replaced boundaries with .clamp
Signed-off-by: Martin Staadecker <machstg@gmail.com>

* Undo line wrap from previous commit
Signed-off-by: Martin Staadecker <machstg@gmail.com>

* Update onSubmitted to only call setState when value has changed
Signed-off-by: Martin Staadecker <machstg@gmail.com>