Ensures that all folders will be listed in wikiSidebar file upload folder list regardless of the order in which files are processed.
Ensures that all folders will be listed in wikiSidebar file upload
folder list regardless of the order in which files are processed.

Fixes #363

Before testing commit:
 * Create a folder in a course which comes before "course files" alphabetically.
 * Edit a page. Open the "Files" tab in the sidebar.
 * Click "Upload a new file."
 * Note that the folder you created (for example "class lectures") is not present in the list of folders to which you can upload.

Test plan:
 * Create a folder in a course which comes before "course files" alphabetically.
 * Edit a page. Open the "Files" tab in the sidebar.
 * Click "Upload a new file."
 * Note that the folder you create (for example "class lectures") IS present in the list of folders to which you can upload.

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