Add helpers

Public/Enable-ExcelAutoFilter.ps1

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+function Enable-ExcelAutoFilter {
+    <#
+        .SYNOPSIS
+        Enable the Excel AutoFilter
+
+        .EXAMPLE
+        Enable-ExcelAutoFilter $targetSheet
+    #>    
+    param(
+        [Parameter(Mandatory)]
+        [OfficeOpenXml.ExcelWorksheet]$Worksheet 
+    )
+
+    $range = Get-ExcelSheetDimensionAddress $Worksheet    
+    $Worksheet.Cells[$range].AutoFilter = $true
+}