Resolves #299, Resolves #234 Fix entity picture url issue

lib/entity_class/entity.class.dart

@@ -95,7 +95,7 @@ class Entity {
   bool get isBadge => Entity.badgeDomains.contains(domain);
   String get icon => attributes["icon"] ?? "";
   bool get isOn => state == EntityState.on;
-  String get entityPicture => attributes["entity_picture"];
+  String get entityPicture => _getEntityPictureUrl();
   String get unitOfMeasurement => attributes["unit_of_measurement"] ?? "";
   List get childEntityIds => attributes["entity_id"] ?? [];
   String get lastUpdated => _getLastUpdatedFormatted();
@@ -103,6 +103,19 @@ class Entity {
   double get doubleState => double.tryParse(state) ?? 0.0;
   int get supportedFeatures => attributes["supported_features"] ?? 0;
 
+  String _getEntityPictureUrl() {
+    String result = attributes["entity_picture"];
+    if (result == null) return result;
+    if (!result.startsWith("http")) {
+      if (result.startsWith("/")) {
+        result = "$homeAssistantWebHost$result";
+      } else {
+        result = "$homeAssistantWebHost/$result";
+      }
+    }
+    return result;
+  }
+
   Entity(Map rawData) {
     update(rawData);
   }

lib/entity_widgets/controls/media_player_widgets.dart

@@ -81,7 +81,7 @@ class MediaPlayerWidget extends StatelessWidget {
           children: <Widget>[
             Flexible(
               child: Image(
-                image: CachedNetworkImageProvider("$homeAssistantWebHost${entity.entityPicture}"),
+                image: CachedNetworkImageProvider("${entity.entityPicture}"),
                 height: 240.0,
                 //width: 320.0,
                 fit: BoxFit.contain,

lib/entity_widgets/entity_icon.dart

@@ -36,19 +36,11 @@ class EntityIcon extends StatelessWidget {
             image: DecorationImage(
               fit:BoxFit.cover,
               image: CachedNetworkImageProvider(
-                "$homeAssistantWebHost${data.entity.entityPicture}",
+                "${data.entity.entityPicture}",
               ),
             )
         ),
       );
-      return CircleAvatar(
-        radius: size/2+0,
-
-        backgroundColor: Colors.white,
-        backgroundImage: CachedNetworkImageProvider(
-          "$homeAssistantWebHost${data.entity.entityPicture}",
-        ),
-      );
     } else {
       String iconName = data.icon;
       int iconCode = 0;