Revert LPS-48386 since it doesn't allow for fast development
LPS-48386 don't check date by default
LPS-48387 Add a new property for the css developer mode
LPS-48387 Assume the css fast load if the developer mode is disabled
LPS-48387 Avoid to initialize slow behaviour in the theme and session if the developer mode is not enabled
LPS-48387 SF
LPS-48387 Documentation
LPS-48387 SF - rename the property