don't require a disabled message on publishable models
don't require a disabled message on publishable models

test plan:
 - on the wiki pages index (/course/:course_id/pages)
 * clicking the publish icon for a page should publish the page
 * clicking the icon again should unpublish the page

fixes #CNVS-7101

Change-Id: I5cba153f57b771866b3f6ce17cb27ba150e05789
Reviewed-on: https://gerrit.instructure.com/22618
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Bracken Mosbacker <48b846001bca4166dc3fb7711563afc17525921e@instructure.com>
Product-Review: Bracken Mosbacker <48b846001bca4166dc3fb7711563afc17525921e@instructure.com>
QA-Review: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>

efrj/canvas-lms,djbender/canvas-lms,utkarshx/canvas-lms,tgroshon/canvas-lms,usmschuck/canvas,kyroskoh/canvas-lms,dgynn/canvas-lms,arrivu/hoodemo,leftplusrightllc/canvas-lms,Rvor/canvas-lms,landonwilkins/canvas-lms,sfu/canvas-lms,whalejasmine/canvas-lms,ShreniiNepal/shrenii_lmp,merichar/canvas-lms,loganrun/pincan,samuels410/greatlakes-lms,sfu/canvas-lms,arrivu/jigsaw-lms,redconfetti/canvas-lms,wye0220/shindig-canvas,merichar/canvas-lms,jay3126/canvas-lms,AndranikMarkosyan/lms,AndranikMarkosyan/lms,wimemx/Canvas,grahamb/canvas-lms,gbleydon/canvas-lms,roxolan/canvas-lms,tgroshon/canvas-lms,snehakachroo1/LSI_replica,shidao-fm/canvas-lms,jay3126/canvas-lms,antoniuslin/canvas-lms,loganrun/pincan,sfu/canvas-lms,eCNAP/CANVAS,narigone/canvas,usmschuck/canvas,grahamb/canvas-lms,va7map/canvas-lms,efrj/canvas-lms,venturehive/canvas-lms,narigone/canvas,skmezanul/canvas-lms,matematikk-mooc/canvas-lms,sdeleon28/canvas-lms,efrj/canvas-lms,dgynn/canvas-lms,venturehive/canvas-lms,va7map/canvas-lms,sdeleon28/canvas-lms,greyhwndz/canvas-lms,greyhwndz/canvas-lms,eCNAP/CANVAS,skmezanul/canvas-lms,utkarshx/canvas-lms,arrivu/qibla-ecampus,fronteerio/canvas-lms,arrivu/qibla-ecampus,sdeleon28/canvas-lms,kyroskoh/canvas-lms,landonwilkins/canvas-lms,samuels410/greatlakes-lms,redconfetti/canvas-lms,AndranikMarkosyan/lms,Unow/canvas-lms,shidao-fm/canvas-lms,arrivu/hoodemo,wrdsb/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,roxolan/canvas-lms,arrivu/arrivu-lms,loganrun/pincan,fronteerio/canvas-lms,wrdsb/canvas-lms,Rvor/canvas-lms,ShreniiNepal/shrenii_lmp,whalejasmine/canvas-lms,landonwilkins/canvas-lms,whalejasmine/canvas-lms,wrdsb/canvas-lms,venturehive/canvas-lms,snehakachroo1/LSI_replica,HotChalk/canvas-lms,merichar/canvas-lms,utkarshx/canvas-lms,ShreniiNepal/shrenii_lmp,Jyaasa/canvas-lms,gbleydon/canvas-lms,juoni/canvas-lms,roxolan/canvas-lms,arrivu/arrivu-lms,antoniuslin/canvas-lms,roxolan/canvas-lms,kyroskoh/canvas-lms,efrj/canvas-lms,skmezanul/canvas-lms,juoni/canvas-lms,redconfetti/canvas-lms,skmezanul/canvas-lms,va7map/canvas-lms,wimemx/Canvas,usmschuck/canvas,sdeleon28/canvas-lms,matematikk-mooc/canvas-lms,SwinburneOnline/canvas-lms,matematikk-mooc/canvas-lms,Jyaasa/canvas-lms,sfu/canvas-lms,wye0220/shindig-canvas,SwinburneOnline/canvas-lms,snehakachroo1/LSI_replica,va7map/canvas-lms,SwinburneOnline/canvas-lms,djbender/canvas-lms,redconfetti/canvas-lms,Unow/canvas-lms,narigone/canvas,instructure/canvas-lms,greyhwndz/canvas-lms,SwinburneOnline/canvas-lms,HotChalk/canvas-lms,Rvor/canvas-lms,wye0220/shindig-canvas,arrivu/hoodemo,eCNAP/CANVAS,shidao-fm/canvas-lms,leftplusrightllc/canvas-lms,jay3126/canvas-lms,Jyaasa/canvas-lms,sfu/canvas-lms,whalejasmine/canvas-lms,matematikk-mooc/canvas-lms,fronteerio/canvas-lms,leftplusrightllc/canvas-lms,djbender/canvas-lms,kyroskoh/canvas-lms,gbleydon/canvas-lms,juoni/canvas-lms,grahamb/canvas-lms,djbender/canvas-lms,grahamb/canvas-lms,dgynn/canvas-lms,utkarshx/canvas-lms,samuels410/greatlakes-lms,antoniuslin/canvas-lms,AndranikMarkosyan/lms,landonwilkins/canvas-lms,grahamb/canvas-lms,ShreniiNepal/shrenii_lmp,tgroshon/canvas-lms,samuels410/greatlakes-lms,eCNAP/CANVAS,usmschuck/canvas,venturehive/canvas-lms,tgroshon/canvas-lms,juoni/canvas-lms,sfu/canvas-lms,arrivu/jigsaw-lms,antoniuslin/canvas-lms,arrivu/jigsaw-lms,HotChalk/canvas-lms,arrivu/arrivu-lms,Rvor/canvas-lms,HotChalk/canvas-lms,wrdsb/canvas-lms,fronteerio/canvas-lms,dgynn/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,greyhwndz/canvas-lms,shidao-fm/canvas-lms,wimemx/Canvas,Unow/canvas-lms,instructure/canvas-lms,arrivu/qibla-ecampus,leftplusrightllc/canvas-lms,instructure/canvas-lms,narigone/canvas,jay3126/canvas-lms,sfu/canvas-lms,Jyaasa/canvas-lms,snehakachroo1/LSI_replica