enhance asset mgmt

- invoke ico directly
- invoke ico only at shortcut creation
- remove "ConvertTo-Icon" Function file

- removed image from xaml
- added stackpanel to xaml
- added functions to create viewbox with image
- added logic to add image via code to xaml & customdialog
- changed title color for customdialog

- remove webinvokes for assets from main.ps1

TODO: convert images into bitmap base64 string & add them directly into invoke-WinUtiltaskbaritem.ps1

functions/public/Invoke-WPFShortcut.ps1

@@ -51,6 +51,9 @@ function Invoke-WPFShortcut {
     $Shortcut = $WshShell.CreateShortcut($FileBrowser.FileName)
     $Shortcut.TargetPath = $shell
     $Shortcut.Arguments = $shellArgs
+    if (-NOT (Test-Path -Path $winutildir["logo.ico"])) {
+        Invoke-WebRequest -Uri "https://christitus.com/images/logo-full.ico" -OutFile $winutildir["logo.ico"]
+    }
     if (Test-Path -Path $winutildir["logo.ico"]) {
         $shortcut.IconLocation = $winutildir["logo.ico"]
     }