[SAK-40345] Announcements > Sort order problems - Sakai

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Test Plan:
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navigate to an empty announcement tool

create at least 11 announcements (body text being irrelevant) named like "A01", "A02", etc

note that default sort order is by "Modified Date", descending (latest first), with 10 items viewable

test column-click bug

click "Modified Date" column

verify that you see items A01 through A10, sorted in ascending order (the bug would result in seeing A2 through A11 ascending)

test subset sort reset

change the view to "show 5 items..."

click the ">" button to view items 6-10

click any sorting column, and verify that the set being viewed is reset to "1-5" (and that they are properly sorted, of course)
Show
navigate to an empty announcement tool create at least 11 announcements (body text being irrelevant) named like "A01", "A02", etc note that default sort order is by "Modified Date", descending (latest first), with 10 items viewable test column-click bug click "Modified Date" column verify that you see items A01 through A10, sorted in ascending order (the bug would result in seeing A2 through A11 ascending) test subset sort reset change the view to "show 5 items..." click the ">" button to view items 6-10 click any sorting column, and verify that the set being viewed is reset to "1-5" (and that they are properly sorted, of course)

This patch fixes two issues with announcement sorting, one bug and one usability feature:

a bug where the first time clicking on a sorting header, the sort will take any 'overflow' (based on the number of items being viewed) from the top of the list first, making the 'first x items' of a list actually be the last X items, though sorted correctly on-screen
- example: in a list of items named 1-250 (created in ascending order), viewing 200 items, the first click of "modified by" would show items 50-250, correctly sorted by date, while items 1-49 (which should be the earliest and thus on the initial screen) are pushed off to first overflow page.
if you were looking at a subset in the middle of the list (say, announcments 21-40 out of 60), doing a re-sort by clicking a column header would leave you looking at 21-40 of the new sort order, rather than re-sorting then showing you the first 20 of whatever you wanted.