Conditionally hide/show lights etc. in the dashboard

[johro897]

I, as most likely many, have a lot of lights that I add for christmas season, some light also replaces others not as christmasy lights. This causes me to have to go through all rooms and hide/unhide the lights I want, when christmas decoration is set up and taken down.

Everything else, automations and non DD settings are handled by a simple flag, boolean for christmas on/off (also have this for example guestmode), so when christmas mode is on it will light different scenarios.

What I would like to see is when I turn on christmas mode, DD also changes which lights is visible in each room.