desktop-shell: fix the unlock dialog decorations

The decorations were not responding, could not move or resize the
dialog, and it painted with a black shade.

When the dialog is created, schedule a resize instead of a repaint. The
resize will initialise the widget tree, and let everything draw and work
as it should.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
1 file changed