panel.edc: Fixed different behavior of right oriented panel.
panel.edc: Fixed different behavior of right oriented panel.

When pressed in and released out of handle,
right oriented panel shows different behavior.

In addition, fixed highlight_show, highlight_hide signal like other orientation.

tasn/elementary,rvandegrift/elementary,rvandegrift/elementary,FlorentRevest/Elementary,tasn/elementary,tasn/elementary,FlorentRevest/Elementary,tasn/elementary,tasn/elementary,FlorentRevest/Elementary,FlorentRevest/Elementary,rvandegrift/elementary,rvandegrift/elementary