validity check item position for moving up/down
validity check item position for moving up/down

rdmenezes/fibernavigator2,braingl/braingl,mhough/braingl,rdmenezes/fibernavigator2,TheProjecter/braingl,braingl/braingl,mhough/braingl,mhough/braingl,TheProjecter/braingl,TheProjecter/braingl,braingl/braingl