[CORE] Dark Mode & User Settings
After a successful Dark Mode beta test launched for Halloween, we are now moving the option to the User Settings panel.
The "Light/Dark Beta" button featured on banner is removed.
Users can now modify their appearance preferences in the User Settings panel.
By default, the platform theme will match the system preferences of the users.
This is the first step of a revamp user settings panel that will contain more items in the future.
All current settings are merged into a single page.
The Session access restriction, TOTP, Email, Password and Close account settings are now displayed in dedicated modals.
[MISC] Add a PAT for Bug Tracker at BU level
Managers can now create a global token for Bug Tracker at BU level instead of having to create a bug tracking for every single program.
