Changed Close button to text to &Close

The close button in reload prompt message box had no keyboard shortcut.
The text was changed to &Close to add the shortcut. This behavior is
useful after a long QtCreator session and several Qt intermediate files
open. When those files are regenerated it's useful to close them.

Change-Id: I25a9134eeed3ce6f10a5b698c7eda9f714f3bae5
Reviewed-by: David Schulz <david.schulz@theqtcompany.com>

src/libs/utils/reloadpromptutils.cpp

@@ -66,6 +66,9 @@ QTCREATOR_UTILS_EXPORT ReloadPromptAnswer reloadPrompt(const QString &title,
     msg.setText(prompt);
     msg.setDetailedText(details);
 
+    msg.button(QMessageBox::Close)->setText(QCoreApplication::translate("Utils::reloadPrompt",
+                                                                        "&Close"));
+
     switch (msg.exec()) {
     case QMessageBox::Yes:
         return  ReloadCurrent;