Refactor docs

mkdocs-website/docs/en/development/changes_dialogs.md

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+## Dialogs
+
+Dialogs are now available in JavaScript!
+
+### Windows
+
+Dialog buttons in Windows are not configurable and are constant depending on the
+type of dialog. To trigger a callback when a button is pressed, create a button
+with the same name as the button you wish to have the callback attached to.
+Example: Create a button with the label `Ok` and use `OnClick()` to set the
+callback method:
+
+```go
+        dialog := app.QuestionDialog().
+			SetTitle("Update").
+			SetMessage("The cancel button is selected when pressing escape")
+		ok := dialog.AddButton("Ok")
+		ok.OnClick(func() {
+			// Do something
+		})
+		no := dialog.AddButton("Cancel")
+		dialog.SetDefaultButton(ok)
+		dialog.SetCancelButton(no)
+		dialog.Show()
+```