dojox.layout.ToggleSplitter tests

Click the splitters to toggle them open/collapsed(optional)/closed. If toggleSplitterCollapsedSize is set on the content pane, the pane has the optional collapsed state. Or it only has two states.

Resizable top bar with three states (open/collapsed/closed). The toggleSplitterCollapsedSize is "20px" here.
Main panel with a link.
(to check we're copying children around properly).
Initialized closed
Resizable bottom bar which background color is changed when the toggle button is clicked.