Migrate REST API progress status to use Write-Progress (#167)

When this module was originally written, it used a special feature
of Write-Host in order to re-write the previously written line, in
order to show the user an indeterminate waiting indicator while the
module awaited a response from the server for a REST API request.

Unfortunately, this doesn't work well with all PowerShell hosts
(PowerShell ISE is one notable example).  This approach had been taken
originally as it had seemed odd to use Write-Progress (which displays
an absolute progress percentage) for something where we didn't absolutely
know the final duration.

This change migrates the module over to use Write-Progress, and simply
loops through the displayed percentage completed in the same manor that
it loops through and shows an animation.

This method should achieve the same desired goal (letting users know
that something is happening and that they just need to wait a bit
longer) in a more standards-approved way.

Resolves #119

Helpers.ps1

@@ -48,13 +48,11 @@ function Wait-JobWithAnimation
     $animationFrames = '|','/','-','\'
     $framesPerSecond = 9
 
-    # We'll wrap the description (if provided) in brackets for display purposes.
-    if ($Description -ne "")
-    {
-        $Description = "[$Description]"
-    }
-
+    $progressId = 1
     $iteration = 0
+    [int] $seconds = 0
+    $secondWord = 'seconds'
+
     while ($runningJobs.Count -gt 0)
     {
         # We'll run into issues if we try to modify the same collection we're iterating over
@@ -92,24 +90,45 @@ function Wait-JobWithAnimation
             $runingJobs.Clear()
         }
 
-        Write-InteractiveHost "`r$($animationFrames[$($iteration % $($animationFrames.Length))])  Elapsed: $([int]($iteration / $framesPerSecond)) second(s) $Description" -NoNewline -f Yellow
-        Start-Sleep -Milliseconds ([int](1000/$framesPerSecond))
+        $seconds = [int]($iteration / $framesPerSecond)
+        $secondWord = 'seconds'
+        if (1 -eq $seconds)
+        {
+            $secondWord = 'second'
+        }
+
+        $animationFrameNumber = $iteration % $($animationFrames.Length)
+        $progressParams = @{
+            'Activity' = $Description
+            'Status' = "$($animationFrames[$animationFrameNumber]) Elapsed: $seconds $secondWord"
+            'PercentComplete' = $(($animationFrameNumber / $animationFrames.Length) * 100)
+            'Id' = $progressId
+        }
+
+        Write-Progress @progressParams
+        Start-Sleep -Milliseconds ([int](1000 / $framesPerSecond))
         $iteration++
     }
 
+    # We'll wrap the description (if provided) in brackets for display purposes.
+    if (-not [string]::IsNullOrWhiteSpace($Description))
+    {
+        $Description = "[$Description]"
+    }
+
     if ($allJobsCompleted)
     {
-        Write-InteractiveHost "`rDONE - Operation took $([int]($iteration / $framesPerSecond)) second(s) $Description" -NoNewline -f Green
+        Write-InteractiveHost "`rDONE - Operation took $seconds $secondWord $Description" -NoNewline -f Green
 
         # We forcibly set Verbose to false here since we don't need it printed to the screen, since we just did above -- we just need to log it.
-        Write-Log -Message "DONE - Operation took $([int]($iteration / $framesPerSecond)) second(s) $Description" -Level Verbose -Verbose:$false
+        Write-Log -Message "DONE - Operation took $seconds $secondWord $Description" -Level Verbose -Verbose:$false
     }
     else
     {
-        Write-InteractiveHost "`rDONE (FAILED) - Operation took $([int]($iteration / $framesPerSecond)) second(s) $Description" -NoNewline -f Red
+        Write-InteractiveHost "`rDONE (FAILED) - Operation took $seconds $secondWord $Description" -NoNewline -f Red
 
         # We forcibly set Verbose to false here since we don't need it printed to the screen, since we just did above -- we just need to log it.
-        Write-Log -Message "DONE (FAILED) - Operation took $([int]($iteration / $framesPerSecond)) second(s) $Description" -Level Verbose -Verbose:$false
+        Write-Log -Message "DONE (FAILED) - Operation took $seconds $secondWord $Description" -Level Verbose -Verbose:$false
     }
 
     Write-InteractiveHost ""