Allow Account App settings to be responsive
Allow Account App settings to be responsive

Fixes: USERS-279

flag = responsive_2020_03

Test plan:
- Enable the responsive_2020_03 feature flag at the root
  or institution level
- Navigate to the Account settings
- Click on the App tab in responsive view
- Confirm the buttons 'Manage App List' and
  'View App Configurations' buttons are responsive

Change-Id: Id7ec6e54afd3babfe7f198c969e5aceb675808fd
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/231298
Reviewed-by: Laura Gonzalez-Horwitz <7fd1adc466f6c2902e6930f85ab8510191346c59@instructure.com>
Reviewed-by: Ed Schiebel <0ca8a83847a5889cf05cb219c0ab09f6b646243b@instructure.com>
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
QA-Review: Daniel Sasaki <ae19fabf7fe19dff310008c9b6a4d2ec84d311d8@instructure.com>
Product-Review: Daniel Sasaki <ae19fabf7fe19dff310008c9b6a4d2ec84d311d8@instructure.com>

sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms