Apply 'read' message status icon.

Signal/Images.xcassets/message_status_delivered.imageset/Contents.json

@@ -2,7 +2,7 @@
   "images" : [
     {
       "idiom" : "universal",
-      "filename" : "double check@1x.png",
+      "filename" : "delivered-18x12@1x.png",
       "scale" : "1x"
     },
     {

Signal/Images.xcassets/message_status_read.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "read-18x12@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "read-18x12@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "read-18x12@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

Signal/Images.xcassets/message_status_sent.imageset/Contents.json

@@ -2,17 +2,17 @@
   "images" : [
     {
       "idiom" : "universal",
-      "filename" : "check@1x.png",
+      "filename" : "sent-12@1x.png",
       "scale" : "1x"
     },
     {
       "idiom" : "universal",
-      "filename" : "check@2x.png",
+      "filename" : "sent-12@2x.png",
       "scale" : "2x"
     },
     {
       "idiom" : "universal",
-      "filename" : "check@3x.png",
+      "filename" : "sent-12@3x.png",
       "scale" : "3x"
     }
   ],

Signal/src/ViewControllers/ConversationView/Cells/OWSMessageFooterView.m

@@ -107,9 +107,11 @@ NS_ASSUME_NONNULL_BEGIN
                 statusIndicatorImage = [UIImage imageNamed:@"message_status_sent"];
                 break;
             case MessageReceiptStatusDelivered:
-            case MessageReceiptStatusRead:
                 statusIndicatorImage = [UIImage imageNamed:@"message_status_delivered"];
                 break;
+            case MessageReceiptStatusRead:
+                statusIndicatorImage = [UIImage imageNamed:@"message_status_read"];
+                break;
             case MessageReceiptStatusFailed:
                 // No status indicator icon.
                 break;

Signal/src/ViewControllers/HomeView/HomeViewCell.m

@@ -294,8 +294,7 @@ NS_ASSUME_NONNULL_BEGIN
                     statusIndicatorImage = [UIImage imageNamed:@"message_status_delivered"];
                     break;
                 case MessageReceiptStatusRead:
-                    statusIndicatorImage = [UIImage imageNamed:@"message_status_delivered"];
-                    messageStatusViewTintColor = [UIColor ows_signalBlueColor];
+                    statusIndicatorImage = [UIImage imageNamed:@"message_status_read"];
                     break;
                 case MessageReceiptStatusFailed:
                     statusIndicatorImage = [UIImage imageNamed:@"message_status_failed"];