System specific update

Reload-Scripts now loads Platform/OS specific scripts depending on
current state.
This required the SystemName class

sranger is an example of running ranger as sudo, but only in Linux.

Moved Get-MyAliases into Reload-MyScripts, and changed Reload-MyScripts
to load Aliases dynamically via the Aliases directory.

Edit-MyScript.ps1

@@ -9,6 +9,16 @@
     [FunctionName]::_GetValidValues($wordToComplete,$true)
   })]
   [string[]]$ImportFunction,
+  [ArgumentCompleter({ param (
+      $commandName,
+      $parameterName,
+      $wordToComplete,
+      $commandAst,
+      $fakeBoundParameters
+    )
+    [SystemName]::_GetValidValues($wordToComplete,$false,$true)
+  })]
+  [string]$System,
   [switch]$ForceImport,
   [Parameter(Position = 0, ValueFromRemainingArguments = $true)]
   [ArgumentCompleter({ param (
@@ -18,16 +28,24 @@
       $commandAst,
       $fakeBoundParameters
     )
-    [MyScript]::_GetValidValues($wordToComplete,$true)
+    $local:possibleValues = [MyScript]::_GetValidValues($wordToComplete,$true)
+    if( $fakeBoundParameters.ContainsKey("System") ) {
+      $possibleValues = $possibleValues | Where-Object { $_ -match "^sys\.$($fakeBoundParameters.System)" } | ForEach-Object { $_ -replace "^sys\.$($fakeBoundParameters.System).",'' }
+    }
+    $possibleValues
   })]
   [string[]]$ScriptName
 )
 
+$local:EditRootPath=$MyPSScriptRoot
+if( $System ) {
+    $EditRootPath = Join-Path $EditRootPath "sys.$System"
+}
 $local:ScriptPaths = @()
 foreach( $local:p in $ImportFunction ) {
   $local:f = Get-Command $p -Type Function
   if( $f ) {
-    $local:sp = Join-Path $MyPSScriptRoot "$p`.ps1"
+    $local:sp = Join-Path $EditRootPath "$p`.ps1"
     if( $ForceImport -or -not (Test-Path $sp) ) {
       Export-FunctionSource $p -NoHeader > $sp
     } elseif ( -not $ForceImport ) {
@@ -37,12 +55,19 @@ foreach( $local:p in $ImportFunction ) {
   }
 }
 foreach( $local:p in $ScriptName ) {
-  $local:sp = Join-Path $MyPSScriptRoot "$p`.ps1"
+  $local:sp = Join-Path $EditRootPath "$p`.ps1"
   $ScriptPaths += $sp
 }
 
 if( -not $ScriptPaths ) {
-  $ScriptPaths += $MyPSScriptRoot
+  $ScriptPaths += $EditRootPath
+}
+
+foreach( $local:p in $ScriptPaths ) {
+    $local:parentPath = Split-Path -Parent $p;
+    if( -not (Test-Path $p) -and -not (Test-Path $parentPath) ) {
+        New-Item -Directory $parentPath
+    }
 }
 
 Edit-TextFile $ScriptPaths