Unleash 5.1: Bulk toggling and improved login

Unleash 5.1 introduces new features and improvements, focusing on bulk toggling and enhanced login options. The bulk toggling feature allows users to enable or disable multiple flags simultaneously, complementing other bulk actions such as archiving and tagging, with actions applying existing strategies or defaulting to a 100% rollout. Additionally, improvements to SSO and sign-in options include a warning screen for disabling password-based logins and bug fixes on the password change screen, along with updated documentation for setting up Azure AD SSO. These updates reflect user requests and aim to enhance functionality and user experience.