add custom help links to en.yml for translation.
add custom help links to en.yml for translation.

fixes CNVS-4051

test plan
- run rake canvas:compile_assets
- open a canvas page with ?optimized_js=1 appended to the
    URL;
- in a browser console, run
    `I18n.translations.en.support.help_menu`;
- verify that translations exist in that namespace.

Change-Id: I4bb878b7be2255564162e6e7f97b155bbdc51fba
Reviewed-on: https://gerrit.instructure.com/17919
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Zach Pendleton <514dbb4d54d4f29e454990df7d075678f43f92aa@instructure.com>
QA-Review: Dave Jungst <bfcdf3e6ca6cef45543bfbb57509c92aec9a39fb@instructure.com>

matematikk-mooc/canvas-lms,narigone/canvas,kyroskoh/canvas-lms,arrivu/jigsaw-lms,arrivu/jigsaw-lms,eCNAP/CANVAS,tgroshon/canvas-lms,instructure/canvas-lms,roxolan/canvas-lms,AndranikMarkosyan/lms,samuels410/greatlakes-lms,juoni/canvas-lms,eCNAP/CANVAS,sfu/canvas-lms,matematikk-mooc/canvas-lms,leftplusrightllc/canvas-lms,HotChalk/canvas-lms,grahamb/canvas-lms,instructure/canvas-lms,fronteerio/canvas-lms,venturehive/canvas-lms,utkarshx/canvas-lms,va7map/canvas-lms,kyroskoh/canvas-lms,SwinburneOnline/canvas-lms,jay3126/canvas-lms,wye0220/shindig-canvas,leftplusrightllc/canvas-lms,dgynn/canvas-lms,matematikk-mooc/canvas-lms,sdeleon28/canvas-lms,Unow/ins,rup/Tarrax,sdeleon28/canvas-lms,ShreniiNepal/shrenii_lmp,usmschuck/canvas,samuels410/greatlakes-lms,efrj/canvas-lms,instructure/canvas-lms,narigone/canvas,efrj/canvas-lms,sli7246/canvas_branch,landonwilkins/canvas-lms,venturehive/canvas-lms,juoni/canvas-lms,va7map/canvas-lms,greyhwndz/canvas-lms,instructure/canvas-lms,merichar/canvas-lms,SwinburneOnline/canvas-lms,ShreniiNepal/shrenii_lmp,leftplusrightllc/canvas-lms,samuels410/greatlakes-lms,shidao-fm/canvas-lms,juoni/canvas-lms,arrivu/arrivu-lms,merichar/canvas-lms,va7map/canvas-lms,antoniuslin/canvas-lms,grahamb/canvas-lms,wimemx/Canvas,grahamb/canvas-lms,Unow/canvas-lms,utkarshx/canvas-lms,jay3126/canvas-lms,snehakachroo1/LSI_replica,skmezanul/canvas-lms,sfu/canvas-lms,kyroskoh/canvas-lms,skmezanul/canvas-lms,Unow/ins,djbender/canvas-lms,AndranikMarkosyan/lms,fronteerio/canvas-lms,ShreniiNepal/shrenii_lmp,eCNAP/CANVAS,sdeleon28/canvas-lms,sli7246/canvas_branch,gbleydon/canvas-lms,HotChalk/canvas-lms,landonwilkins/canvas-lms,arrivu/hoodemo,arrivu/arrivu-lms,loganrun/pincan,wye0220/shindig-canvas,Jyaasa/canvas-lms,gbleydon/canvas-lms,Unow/ins,tgroshon/canvas-lms,arrivu/jigsaw-lms,jay3126/canvas-lms,grahamb/canvas-lms,redconfetti/canvas-lms,arrivu/qibla-ecampus,snehakachroo1/LSI_replica,arrivu/hoodemo,instructure/canvas-lms,sfu/canvas-lms,matematikk-mooc/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,ShreniiNepal/shrenii_lmp,usmschuck/canvas,roxolan/canvas-lms,djbender/canvas-lms,fronteerio/canvas-lms,antoniuslin/canvas-lms,wye0220/shindig-canvas,usmschuck/canvas,antoniuslin/canvas-lms,rup/Tarrax,sfu/canvas-lms,wimemx/Canvas,arrivu/hoodemo,samuels410/greatlakes-lms,redconfetti/canvas-lms,fronteerio/canvas-lms,skmezanul/canvas-lms,HotChalk/canvas-lms,dgynn/canvas-lms,whalejasmine/canvas-lms,efrj/canvas-lms,Rvor/canvas-lms,greyhwndz/canvas-lms,arrivu/arrivu-lms,wrdsb/canvas-lms,va7map/canvas-lms,AndranikMarkosyan/lms,utkarshx/canvas-lms,shidao-fm/canvas-lms,leftplusrightllc/canvas-lms,Jyaasa/canvas-lms,instructure/canvas-lms,shidao-fm/canvas-lms,jay3126/canvas-lms,AndranikMarkosyan/lms,greyhwndz/canvas-lms,narigone/canvas,redconfetti/canvas-lms,roxolan/canvas-lms,gbleydon/canvas-lms,Unow/canvas-lms,dgynn/canvas-lms,SwinburneOnline/canvas-lms,efrj/canvas-lms,Rvor/canvas-lms,loganrun/pincan,SwinburneOnline/canvas-lms,djbender/canvas-lms,sdeleon28/canvas-lms,whalejasmine/canvas-lms,loganrun/pincan,sfu/canvas-lms,eCNAP/CANVAS,wimemx/Canvas,usmschuck/canvas,wrdsb/canvas-lms,kyroskoh/canvas-lms,tgroshon/canvas-lms,venturehive/canvas-lms,Unow/canvas-lms,Rvor/canvas-lms,sfu/canvas-lms,HotChalk/canvas-lms,whalejasmine/canvas-lms,djbender/canvas-lms,dgynn/canvas-lms,whalejasmine/canvas-lms,tgroshon/canvas-lms,merichar/canvas-lms,shidao-fm/canvas-lms,utkarshx/canvas-lms,arrivu/qibla-ecampus,landonwilkins/canvas-lms,juoni/canvas-lms,wrdsb/canvas-lms,redconfetti/canvas-lms,instructure/canvas-lms,wrdsb/canvas-lms,rup/Tarrax,arrivu/qibla-ecampus,Jyaasa/canvas-lms,Rvor/canvas-lms,snehakachroo1/LSI_replica,skmezanul/canvas-lms,narigone/canvas,landonwilkins/canvas-lms,grahamb/canvas-lms,snehakachroo1/LSI_replica,greyhwndz/canvas-lms,Jyaasa/canvas-lms,antoniuslin/canvas-lms,roxolan/canvas-lms,sli7246/canvas_branch