Adds Warning Dialog When Following an External Link in Project Manager (#6003)

Signed-off-by: Alex Peterson <26804013+AMZN-alexpete@users.noreply.github.com>

Code/Tools/ProjectManager/Source/LinkWidget.cpp

@@ -7,6 +7,11 @@
  */
 
 #include <LinkWidget.h>
+#include <ExternalLinkDialog.h>
+#include <ProjectManagerSettings.h>
+
+#include <AzCore/Settings/SettingsRegistry.h>
+
 #include <QDesktopServices>
 #include <QEvent>
 #include <QMouseEvent>
@@ -26,7 +31,29 @@ namespace O3DE::ProjectManager
     {
         if (m_url.isValid())
         {
-            QDesktopServices::openUrl(m_url);
+            // Check if user request not to be shown external link warning dialog
+            bool skipDialog = false;
+            auto settingsRegistry = AZ::SettingsRegistry::Get();
+
+            if (settingsRegistry)
+            {
+                QString settingsKey = GetExternalLinkWarningKey();
+                settingsRegistry->Get(skipDialog, settingsKey.toStdString().c_str());
+            }
+
+            if (!skipDialog)
+            {
+                // Style does not apply if LinkLabel is parent so use parentWidget as parent instead
+                ExternalLinkDialog* linkDialog = new ExternalLinkDialog(m_url.toString(), parentWidget());
+                if (linkDialog->exec() == QDialog::Accepted)
+                {
+                    QDesktopServices::openUrl(m_url);
+                }
+            }
+            else
+            {
+                QDesktopServices::openUrl(m_url);
+            }
         }
 
         emit clicked();