* ListViewTest.cs: Added test for bug #79076. Added tests for

* ListViewTest.cs: Added test for bug #79076. Added tests for
sorting bug fixes. Added tests for CheckBoxes and MultiSelect (marked
NotWorking).
* ListViewCollectionsTest.cs: Added tests for SelectedItemCollection
and ListViewItemCollection fixes.
* ListView.cs: Do not initialize item_sorter in init. To match MS,
return null for ListViewItemSorter if View is SmallIcon or LargeIcon
and the internal comparer is set. When a new ListViewItemSorter is set,
sort the items. Use Enum.IsDefined to verify whether a valid SortOrder
was specified. No further processing is necessary if SortOrder is set
to it's current value. If Sorting is modified to None, and View is
neither SmallIcon nor LargeIcon then: on 2.0 profile set item_sorter
(either custom or our internal ItemComparer) to null, on 1.0 profile
only set item_sorter to null if its our internal IComparer. If Sorting
is modified to Ascending or Descending, then use our internal IComparer
if none is set, and if the current IComparer is our internal one then:
on 2.0 profile always replace it with one for new Sorting, and on 1.0
profile only use new Sorting if view is not SmallIcon or LargeIcon. Use
Enum.IsDefined to verify whether a valid View value is specified in
its setter. Automatically sort listview items when listview is
created. In Sort, do nothing if ListView is not yet created, or if
no item_sorter is set (no Sorting was set, Sorting was explicitly set
to None or ListViewItemSorter was set to null). Added Sort overload
taking a bool to indicate whether the ListView should be redrawn when
items are sorted (we use this in ListViewItemCollection to avoid double
redraws). Modified our internal IComparer to take the sort order into
account. In Add and AddRange methods of ListViewItemCollection, also
call Sort if Sorting is None (necessary for SmallIcon and LargeIcon
view), but use overload with noredraw option to avoid double redraw.
On 2.0 profile, throw NotSupportedException when setting CheckBoxes to
true when View is Tile, and do the same when attempting to set View to
Tile when CheckBoxes is true. Avoid maintaining separate ArrayLists
for selected/checked indices, as it involves overhead when sorting is
done while these collections are not used all that often. Instead
we'll build the indices on demand. Modified IList implementation of
CheckedIndexCollection to use public methods if object is int.
Modified CheckedListViewItemCollection to hide checked items if
ListView.CheckBoxes is false. Removed LAMESPEC remark in
ListViewItemCollection as the .NET SDK docs have been fixed. Modified
IList implementation in SelectedIndexCollection to use public methods
if object is int. Modified SelectedListViewItemCollection to hide
selected items if listview is not yet created.
* ListViewItem.cs: CheckedIndices list no longer needs to be
maintained separately (see ListView changes). Also clone font, fixes
test failure.

svn path=/trunk/mcs/; revision=65245