TextView: Setting Text places cursor at beginning, unlike TextField

[tig]

TextView always sets currentRow/currentCol to 0 when Text is set.

Note ResetPosition call:

		public override ustring Text {
			get {
				if (wordWrap) {
					return wrapManager.Model.ToString ();
				} else {
					return model.ToString ();
				}
			}

			set {
				ResetPosition ();
				model.LoadString (value);
				if (wordWrap) {
					wrapManager = new WordWrapManager (model);
					model = wrapManager.WrapModel (frameWidth, out _, out _, out _, out _);
				}
				TextChanged?.Invoke ();
				SetNeedsDisplay ();

				historyText.Clear (Text);
			}
		}

TextField is more intelligent (point) is the cursor pos:

		public new ustring Text {
			get {
				return ustring.Make (text);
			}

			set {
				var oldText = ustring.Make (text);

				if (oldText == value)
					return;

				var newText = OnTextChanging (value.Replace ("\t", "").Split ("\n") [0]);
				if (newText.Cancel) {
					if (point > text.Count) {
						point = text.Count;
					}
					return;
				}
				text = TextModel.ToRunes (newText.NewText);

				if (!Secret && !historyText.IsFromHistory) {
					historyText.Add (new List<List<Rune>> () { oldText.ToRuneList () },
						new Point (point, 0));
					historyText.Add (new List<List<Rune>> () { text }, new Point (point, 0)
						, HistoryText.LineStatus.Replaced);
				}

				TextChanged?.Invoke (oldText);

				if (point > text.Count) {
					point = Math.Max (TextModel.DisplaySize (text, 0).size - 1, 0);
				}

				Adjust ();
				SetNeedsDisplay ();
			}
		}

Debatable if this is broken. I discovered it writing unit tests for fixing #730.

[BDisp]

Normally big text editors, as TextView is, place the cursor at the beginning to avoid navigate unnecessarily to the end and also if the user want to make some search will start find forward which is the default. Now, if MultiLine is disabled it can acts like the TextField.

[BDisp]

Fixed with #2572.