Suppress columns with empty -Header name

[iRon7]

If a header name in a header array is an empty string, skip the concerned column

[iRon7]

Implemented:

ConvertFrom-SourceTable -Header '', Date, '', '', '', 'File' -InputObject @'
                d----l       11/16/2018   8:30 PM                Archive
                -a---l        5/22/2018  12:05 PM          (726) Build-Expression.ps1
                -a---l       11/16/2018   7:38 PM           2143 CHANGELOG
                -a---l       11/17/2018  10:42 AM          14728 ConvertFrom-SourceTable.ps1
                -a---l       11/17/2018  11:04 AM          23909 ConvertFrom-SourceTable.Tests.ps1
                -a---l         8/4/2018  11:04 AM         (6237) Import-SourceTable.ps1
'@

Date       File
----       ----
5/22/2018  Build-Expression.ps1
11/16/2018 CHANGELOG
11/17/2018 ConvertFrom-SourceTable.ps1
11/17/2018 ConvertFrom-SourceTable.Tests.ps1
8/4/2018   Import-SourceTable.ps1