Limit on number of items that can be ordered confusion

[slominskir]

There is a limit on the number of items that can be ordered on a given day, but when the limit is hit, an unhelpful error is displayed. The limit is currently 50. A few items to consider:

1. Can we make this limit larger?
2. At a minimum we need to alert the user about what is going on.
3. Ordering actually includes removing spaces, as spaces are simply index locations without an item in it. So when a user clicks remove space, they're actually re-ordering, which may not be obvious.
4. Perhaps counter-intuitively, the limit doesn't apply when adding items (as they're always appended to the end). Maybe the limit should apply during add to avoid confusion?

The user sees:

The log file shows:

2025-09-27 12:22:54,900 SEVERE [org.jlab.atlis.calendar.presentation.controller.ChangeOrderAjax] (default task-635844) Unable to Drag and Drop: org.jlab.atlis.calendar.presentation.exception.ValidationException: The maximum number of occurrences which can be ordered is 50.  You submitted: 60

Reported by: frierson

[slominskir]

The Calendar already has a feature to handle a large number of items (more than 50) on a given day, the DISPLAY field of a given item can be set to HIDE or MORE. The DISPLAY field default is SHOW, which means show on Week/Month calendar view. The expectation is that users can edit some lesser items and choose Display type = "HIDE" or "MORE" if there are too many items. The "HIDE" and "MORE" types are basically the same, except if a day has at least one item with DISPLAY = "MORE", then an indication is shown on the week/month view.  The Calendar was originally designed to only support showing 50 items on any given day at a time because otherwise the Calendar loses it's shape and is no longer a calendar and instead a super long list.   You can click on a given day to get the full list, if that's what you're really after.