Updated padding for deletion indicators.

The deletion indicators were overflowing their list items and over the
list headers, so I reduced the amount of padding.
Refactored UISegmented & UICreateSegmented.

Updated UISegmented & UICreateSegmented. Now the selected state is only
set by UISegmented during initialization of the segmented control.
UISegmented only accepts 3 arguments: id, className and labels.
Added example for just segmented control without panel toggling.
Updated examples and added an example of just the segmented control
without panel toggling.