Changes 'folder' to 'New Folder'
Changes 'folder' to 'New Folder'

For New Files.  Any new, unnamed folder
will now be named 'New Folder' instead
of just 'folder'.

closes CNVS-17122

Test Plan:
* Enable "Better File Browsing" feature flag
* Go to any course's Files page as a teacher
* Click the "+ Folder" button
* Press enter on the text input that becomes
  focused, leaving it blank.
* The folder created should be called "New Folder"
* Create another new folder
* That folder should be named "New Folder 2"

Change-Id: If58d0979731a82852b39cf5c443fd29aa5e277be
Reviewed-on: https://gerrit.instructure.com/45155
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Clay Diffrient <9dff2e5c98626d20d2848250c411e8009465bb87@instructure.com>
QA-Review: Jahnavi Yetukuri <ed2b2672ccc2e59e56c0615df7f01b579202e014@instructure.com>
Product-Review: Dan Minkevitch <2591e5f46f28d303f9dc027d475a5c60d8dea17a@instructure.com>

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