Fixing positional enter in text area. (#1610)

Author: sakshi-arora1

ui.af.apps/src/main/content/jcr_root/apps/core/fd/components/form/textinput/v1/textinput/clientlibs/site/js/textinputview.js

@@ -87,7 +87,11 @@
                         // Prevent default action of Enter key to avoid form submission
                         event.preventDefault();
                         // Append a newline character to the widget value
-                        this.widget.value = this.widget.value + '\n';
+                        let cursorPosition = this.widget.selectionStart;
+                        let textBefore = this.widget.value.substring(0, cursorPosition);
+                        let textAfter = this.widget.value.substring(this.widget.selectionEnd);
+                        this.widget.value = textBefore + '\n' + textAfter;
+                        this.widget.selectionStart = this.widget.selectionEnd = cursorPosition + 1;
                     }
                 });
             }