View should not turn off AutoSize (in setting Width and/or Height)

Describe the bug In https://github.com/migueldeicaza/gui.cs/pull/1685 from @BDisp, there’s this commit:

Commit a82ac45843d6153f10d7c545721d4aeabb75266d
Author: BDisp <[e-mail]>
Date: Friday, April 29, 2022 5:12 PM
Parent: 933a1bda

Fixes AutoSize, Window Tile and added option to Border for fill or not.

https://github.com/migueldeicaza/gui.cs/pull/1685/files#diff-4a82080ff9e808d1867c94cdd6ac106755bd80a81509546e43f154aed1fe90deR572

		/// <summary>
		/// Gets or sets the width of the view. Only used the <see cref="LayoutStyle"/> is <see cref="LayoutStyle.Computed"/>.
		/// </summary>
		/// <value>The width.</value>
		/// <remarks>
		/// If <see cref="LayoutStyle"/> is <see cref="LayoutStyle.Absolute"/> changing this property has no effect and its value is indeterminate. 
		/// </remarks>
		public Dim Width {
			get => width;
			set {
				if (!ValidatePosDim (width, value)) {
					throw new ArgumentException ();
				}

				width = value;
				if (autoSize && value.Anchor (0) != TextFormatter.Size.Width) {
					autoSize = false;
				}
				SetNeedsLayout ();
				if (width is Dim.DimAbsolute) {
					frame = new Rect (frame.X, frame.Y, width.Anchor (0), frame.Height);
				}
				TextFormatter.Size = frame.Size;
				SetNeedsDisplay (frame);
			}
		}

See how AutoSize is set to false? This breaks code where a Button (or any View) has been set to autosize and then has it’s text changed and the view has been moved (e.g. in the new Dialog code for justifying buttons).

I found this in coding up Wizard. I noticed that when I changed the text of the NextFinished button from Next... to Finished (which is longer) the button did not resize. A workaround is to re-set AutoSize to true when changing the text, but this should not be needed (and will not work in other scenarios).

This Unit Test should be added once this bug is fixed:

		[Fact, AutoInitShutdown]
		public void AutoSize_Stays_True ()
		{
			var btn = new Button () {
				X = Pos.Center (),
				Y = Pos.Center (),
				Text = "Say Hello 你",
				AutoSize = true
			};

			var win = new Window () {
				Width = Dim.Fill (),
				Height = Dim.Fill (),
				Title = "Test Demo 你"
			};
			win.Add (btn);
			Application.Top.Add (win);

			Assert.True (btn.AutoSize);

			Application.Begin (Application.Top);
			((FakeDriver)Application.Driver).SetBufferSize (30, 5);
			var expected = @"
┌ Test Demo 你 ──────────────┐
│                            │
│      [ Say Hello 你 ]      │
│                            │
└────────────────────────────┘
";

			GraphViewTests.AssertDriverContentsWithFrameAre (expected, output);

			Assert.True (btn.AutoSize);
			btn.Width = Dim.Fill ();
			Assert.True (btn.AutoSize);
		}

@BDisp, can you find another way to solve whatever you fixed by doing this?

[tig]

In the current Wizards scenario note how the “Finished” button on the last step has an extra space at end:

And see SettingFileName() test in WizardTests.cs.

This happens here (in Wizard.cs):

[BDisp]

				if (autoSize && value.Anchor (0) != TextFormatter.Size.Width) {
					autoSize = false;
				}

As you can see the autosize only will changed to false if the value.Anchor (0) != TextFormatter.Size.Width. Since the Button.Update handles the TextFormatter.Size before changing the Button.Width, thus the condition always return false. If this happens different in your case, specify where so that I can analyze?