efl_ui_spotlight_container: bring in min / max handling

efl_ui_spotlight_container: bring in min / max handling

the spotlight now is setting the overall correct min and max size on
itself. Additionally, the page size is now clamped to the size of the
container.

Correct min size of the container is defined to the MAX min size of all
the content.
The correct max size of the container is defined to the MIN max size of
all the content.

ref T7991

Differential Revision: https://phab.enlightenment.org/D10766