CodeSnip Old Code (SVN)

* Restyled treeview: hid lines, added expand / collapse buttons, reduced indent and enabled hot tracking of items when mouse passes over them.
* Added keyboard support for controlling tree view scroll bars in both directions, using Ctrl key with arrow keys.

Added IsEmpty method to TSnippetList and modified code that tested TSnippetList.Count for zero to use new IsEmpty method instead.

Standardised svn:mime-type properties to "text/pascal" and svn:eol-style to "native"

Reintegrated v4-dev branch into trunk.
Trunk now contains v4 development tree

Fixed bug where clicking tabs sometimes does not focus them, meaning that pressing Ctrl+Tab or Shift+Ctrl+Tab after clicking the tab does not always change the selected tab as expected.

** This fix is based on, but not identical to, the one applied in the v4-dev branch at r1723.

Fixed problem where overview pane treeview state was not being saved when user changed tab, causing it to be restored incorrectly when navigating back to the tab.

** This is a manual copy of fix applied in v4-dev branch at r1711.

Fixed potential bug by testing for nil notifier in TOverviewFrame.tcDisplayStyleChange.
Fixes Bug #3427889
This is a manual copy of fix applied to same unit in v4-dev branch at r1630.

Fixed bug in overview pane where selecting a view item not in overview pane does not deselect current selection.
Fixes Bug #3427866
This is a manual copy of fix applied to same unit in v4-dev branch at r1617.

Fixed memory leaks.

Added support for toggling section headers between expanded and collapsed state when RETURN key is pressed when a section header is selected in overview pane.