[TYPO3-core] RFC #2859: Feature: List view should have 'collapse' / 'expand' functionality for all list types

[Christian Kuhn]

This is an SVN patch request.

Type: Feature

Bugtracker references:
http://bugs.typo3.org/view.php?id=2859

Branches: trunk

Problem:
List view should have 'collapse' / 'expand' functionality for all list 
types. The changes should persist across sessions. This would enable a 
user to hide the taxes or countries list on the root page. Also, the 
'sub pages' could be hidden so the user can concentrate on content 
records if he uses the list view to edit content elements.

Solution:
Attached patch adds an + / - icon to the table headers in multi table 
view mode. See screenshot. The state of a table is saved in the users uc.

Notes:
This patch improves display performance of the list module for pages 
with many tables and records (eg. the root page with installed 
ext:static_info_tables) if unused tables are collapsed. Those collapsed 
records are also not fetched from db.

Cheers
Christian
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