WebSession: user preference to enable profiling
- Adds a user preference that is available if you have 'profiling' permissions. With this preference, you can enable permanently enable profiling for your user. Useful for debugging random slowness.
Signed-off-by: Alessio Deiana <alessio.deiana@cern.ch>
Tested-by: Tibor Simko <tibor.simko@cern.ch>