Refactor View.Text setter to use SetTextDirect

Replaces direct field and UI updates in the View.Text property setter with a call to SetTextDirect(value). This centralizes text update logic, improving maintainability and reducing code duplication.

Author: tig

Terminal.Gui/ViewBase/View.Text.cs

@@ -74,10 +74,7 @@ public string Text
                 return;
             }
 
-            _text = value;
-
-            UpdateTextFormatterText ();
-            SetNeedsLayout ();
+            SetTextDirect (value);
 
             OnTextChanged ();
         }