Fix offline mode (#4153)

* Fix usb error on drive with no existing partitions

* fix offline mode

* Add offline banner

scripts/start.ps1

@@ -9,7 +9,8 @@
 param (
     [string]$Config,
     [switch]$Run,
-    [switch]$Noui
+    [switch]$Noui,
+    [switch]$Offline
 )
 
 if ($Config) {
@@ -27,6 +28,11 @@ if ($Noui) {
     $PARAM_NOUI = $true
 }
 
+$PARAM_OFFLINE = $false
+if ($Offline) {
+    $PARAM_OFFLINE = $true
+}
+
 
 if (!([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
     Write-Output "Winutil needs to be run as Administrator. Attempting to relaunch."