Website icons (#285)

* Initial attempt at adding favicons.

* Cache the favicons for 30 days.

* Refactor faviconService, remove unused faviconDirective.

* Change icon url to icons.bitwarden.com. Update style to support dynamic size of icon.

* Use hostname instead of domain.

* Fix getFavicon throwing an exception if the uri is not a valid url.

* Add enabled property to faviconService to prevent slow calls to storage. Fixed chrome not displaying chrome://favicon properly.

* Fix chrome disable favicon not working as expected.

* Add default icon.

* Fix jshint errors.

* Cleanup of faviconService, removed caching related code. Add faviconComponent for handling favicons.

* Remove faviconService, moved functionallity into faviconComponent.

* Fix faviconComponent not updating when uri changes.

* Rename favicon to icon.

* Improve whitelist.

src/popup/less/components.less

@@ -349,6 +349,20 @@
             width: ~"calc(100% - 27px)";
         }
 
+        .icon {
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            float: left;
+            height: 36px;
+            width: 36px;
+            img {
+                border-radius: 3px;
+                max-height: 24px;
+                max-width: 24px;
+            }
+        }
+
         .btn-list {
             cursor: pointer;
             float: right;