When any filter is used, is there a way to have that indicated somewhere to avoid thinking the directory is emptier than it is?
'rulerformat' and 'statusline' support:
'rulerformat'
'statusline'
%x - number of files excluded by filters
For example, add %[ +%x%] to 'rulerformat' to get +4 appended to the ruler if there are 4 hidden files.
%[ +%x%]
+4