More specific progress updates

[lgeistlinger]

When working on several cancer types and/or assay types - can we have a more specific progress update indicating on which cancer/assay type cTD currently works? Or alternatively, an overall progress bar, where the length of the progress bar is determined by the datasets that need to be loaded:

> rnacomp <- curatedTCGAData::curatedTCGAData("*", "RNASeq2*", FALSE)
snapshotDate(): 2020-02-12
see ?curatedTCGAData and browseVignettes('curatedTCGAData') for documentation
downloading 1 resources
retrieving 1 resource
  |======================================================================| 100%

loading from cache
see ?curatedTCGAData and browseVignettes('curatedTCGAData') for documentation
downloading 1 resources
retrieving 1 resource
  |======================================================================| 100%

loading from cache
see ?curatedTCGAData and browseVignettes('curatedTCGAData') for documentation
downloading 1 resources
retrieving 1 resource
  |======================================================================| 100%

loading from cache
see ?curatedTCGAData and browseVignettes('curatedTCGAData') for documentation
downloading 1 resources
retrieving 1 resource
  |======================================================================| 100%

loading from cache
see ?curatedTCGAData and browseVignettes('curatedTCGAData') for documentation
downloading 1 resources
retrieving 1 resource
  |======================================================================| 100%

loading from cache
see ?curatedTCGAData and browseVignettes('curatedTCGAData') for documentation
downloading 1 resources
retrieving 1 resource
  |======================================================================| 100%

loading from cache
see ?curatedTCGAData and browseVignettes('curatedTCGAData') for documentation
downloading 1 resources
retrieving 1 resource
  |======================================================================| 100%