agenda: noon pause from 12 to 15
agenda: availability bars updated
agenda: room renamed to ressource
Closes #4653
agenda: disponibility bar refactored. Schedules clean button moved to tabs bar
agenda: noon availability grid more spaced
agenda: noon hours slightly isolated from other day times
agenda: last name put in a paragraph
agenda: useless buttons deleted, prevent displaying "LOADING" when loading schedules
page styles updated
ressource disponibility view refactored
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