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Responsive Button Group Attribute

Groups buttons into a group that will position and resize the buttons based on the amount of available layout space.
Responsive Button Group Big Tab Group 

[Button(ButtonSizes.Large), GUIColor(0, 1, 0)]
private void OpenDockableWindowExample()
{
    var window = UnityEditor.EditorWindow.GetWindow<MyDockableGameDashboard>();
    window.WindowPadding = new Vector4();
}

[OnInspectorGUI] private void Space1() { GUILayout.Space(20); }

[ResponsiveButtonGroup] public void Foo() { }
[ResponsiveButtonGroup] public void Bar() { }
[ResponsiveButtonGroup] public void Baz() { }

[OnInspectorGUI] private void Space2() { GUILayout.Space(20); }

[ResponsiveButtonGroup("UniformGroup", UniformLayout = true)] public void Foo1() { }
[ResponsiveButtonGroup("UniformGroup")] public void Foo2() { }
[ResponsiveButtonGroup("UniformGroup")] public void LongesNameWins() { }
[ResponsiveButtonGroup("UniformGroup")] public void Foo4() { }
[ResponsiveButtonGroup("UniformGroup")] public void Foo5() { }
[ResponsiveButtonGroup("UniformGroup")] public void Foo6() { }

[OnInspectorGUI] private void Space3() { GUILayout.Space(20); }

[ResponsiveButtonGroup("DefaultButtonSize", DefaultButtonSize = ButtonSizes.Small)] public void Bar1() { }
[ResponsiveButtonGroup("DefaultButtonSize")] public void Bar2() { }
[ResponsiveButtonGroup("DefaultButtonSize")] public void Bar3() { }
[Button(ButtonSizes.Large), ResponsiveButtonGroup("DefaultButtonSize")] public void Bar4() { }
[Button(ButtonSizes.Large), ResponsiveButtonGroup("DefaultButtonSize")] public void Bar5() { }
[ResponsiveButtonGroup("DefaultButtonSize")] public void Bar6() { }

[OnInspectorGUI] private void Space4() { GUILayout.Space(20); }

[FoldoutGroup("SomeOtherGroup")]
[ResponsiveButtonGroup("SomeOtherGroup/SomeBtnGroup")] public void Baz1() { }
[ResponsiveButtonGroup("SomeOtherGroup/SomeBtnGroup")] public void Baz2() { }
[ResponsiveButtonGroup("SomeOtherGroup/SomeBtnGroup")] public void Baz3() { }