:bug: MTA-1997 fix for column layout changing widths upon creation/deletion

[ibolton336]

Resolves https://issues.redhat.com/browse/MTA-1997 Match space allocation between column headers and rows to prevent layout shift when the first / last item is added / removed from the table. Before:

https://github.com/konveyor/tackle2-ui/assets/11218376/e5564ea6-e78c-4fc0-92f2-dea496d6b88f

After:

https://github.com/konveyor/tackle2-ui/assets/11218376/7d12ddbd-c46a-4b06-970d-876fe2f90421

• Also addresses mishandling of TBody resulting in several Tbody elements rendered for each row in the table.