Return default text if skipping the text editor when prompted

If we are allowed to skip the editor _and_ we want to append the default
text to the editor if we'd opened it, we just return the default text.

Co-Authored-By: Mislav Marohnić <mislav@github.com>

pkg/surveyext/editor.go

@@ -105,7 +105,7 @@ func (e *GhEditor) prompt(initialValue string, config *survey.PromptConfig) (int
 		}
 		if r == '\r' || r == '\n' {
 			if e.BlankAllowed {
-				return "", nil
+				return initialValue, nil
 			} else {
 				continue
 			}