Makes NVDA not read blank while maintaining spaces

Fixes: SIS-625

Removes BR with P because P isn't read by NVDA

Test-Plan
--With SIS Import enabled--
1.) Navigate to sis import page in accounts/self
--Using NVDA--
2.) Verify that blanks are not read out between
	"no file selected" and "Import Type"
3.) Verify that blanks are not read out between
	"Import Type" and "Full Batch Update"

Change-Id: Ia11f63d305b7aae9d791d4e1cbb6de3bc3fb123a
Reviewed-on: https://gerrit.instructure.com/43961
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Duane Johnson <duane@instructure.com>
Reviewed-by: Nick Houle <nhoule@instructure.com>
QA-Review: Nathan Rogowski <nathan@instructure.com>
Product-Review: Cosme Salazar <cosme@instructure.com>