Copilot: Add Tooltip to links

Change-Id: I24a74272e58658fa607779e73baa7ada56bf085e
Reviewed-by: hjk <hjk@qt.io>

src/plugins/copilot/copilotoptionspage.cpp

@@ -13,6 +13,8 @@
 #include <utils/layoutbuilder.h>
 #include <utils/pathchooser.h>
 
+#include <QToolTip>
+
 using namespace Utils;
 using namespace LanguageClient;
 
@@ -34,6 +36,9 @@ public:
                                            | Qt::LinksAccessibleByKeyboard
                                            | Qt::TextSelectableByMouse);
         helpLabel->setOpenExternalLinks(true);
+        connect(helpLabel, &QLabel::linkHovered, [](const QString &link) {
+            QToolTip::showText(QCursor::pos(), link);
+        });
 
         // clang-format off
         helpLabel->setText(Tr::tr(R"(