loop through URIs to find website before showing default icons (#1572)

- create static class for uri logic (keeping converter for future)
- create new property in viewmodel for icon source
- check if icons are enabled and source for icon before showing default glyph

src/App/Controls/CipherViewCell/CipherViewCellViewModel.cs

@@ -1,4 +1,5 @@
-using Bit.Core.Models.View;
+using Bit.App.Utilities;
+using Bit.Core.Models.View;
 using Bit.Core.Utilities;
 
 namespace Bit.App.Controls
@@ -7,6 +8,7 @@ namespace Bit.App.Controls
     {
         private CipherView _cipher;
         private bool _websiteIconsEnabled;
+        private string _iconImageSource = string.Empty;
 
         public CipherViewCellViewModel(CipherView cipherView, bool websiteIconsEnabled)
         {
@@ -28,8 +30,22 @@ namespace Bit.App.Controls
 
         public bool ShowIconImage
         {
-            get => WebsiteIconsEnabled && !string.IsNullOrWhiteSpace(Cipher.Login?.Uri) &&
-                   Cipher.Login.Uri.StartsWith("http");
+            get => WebsiteIconsEnabled
+                && !string.IsNullOrWhiteSpace(Cipher.Login?.Uri)
+                && IconImageSource != null;
+        }
+
+        public string IconImageSource
+        {
+            get
+            {
+                if (_iconImageSource == string.Empty) // default value since icon source can return null
+                {
+                    _iconImageSource = IconImageHelper.GetLoginIconImage(Cipher);
+                }
+                return _iconImageSource;
+            }
+
         }
     }
 }