Removed some unneeded debug messages

Signed-off-by: Joel Nider <joel@nider.org>
Added new cancel button graphics

Not very professional, but will do the job for now

Signed-off-by: Joel Nider <joel@nider.org>
Added ListDestroy() function

Should be called when a list is not longer needed.
Will automatically remove all nodes in the list, but will not
touch their data.

Signed-off-by: Joel Nider <joel@nider.org>
Fixed creation, deletion and drawing of ifels

Also added the cancel button to the options menu.
The button cannot be pushed, but is drawn.

Signed-off-by: Joel Nider <joel@nider.org>