added the fontSize as a last resort for vars being set in the Label after fontStyle and fontName.
### Summary
Since moving to the new Typography system, we no longer should be accepting fontName/fontSize since you will lose all of the lineHeight/letterSpacing and other special formatting.
I added a use-case for when there is only a fontSize given.
### JIRA Ticket
https://onejira.verizon.com/browse/CXTDT-533868
Co-authored-by: Matt Bruce <matt.bruce@verizon.com>
See merge request https://gitlab.verizon.com/BPHV_MIPS/mvm_core_ui/-/merge_requests/1074