Change mark all as read image to be a PNG, since SwiftUI on AppKit sucks at handling vector resources

Multiplatform/Shared/AppAssets.swift

@@ -167,10 +167,10 @@ struct AppAssets {
 		return Image("MarkAllAsRead")
 	}()
 	
-	static var markAllAsReadImagePDF: Image = {
-		return Image("MarkAllAsReadPDF")
+	static var markAllAsReadImagePNG: Image = {
+		return Image("MarkAllAsReadPNG")
 	}()
-	
+
 	static var nextUnreadArticleImage: Image = {
 		return Image(systemName: "chevron.down.circle")
 	}()

Multiplatform/Shared/Assets.xcassets/MarkAllAsReadPDF.imageset/Contents.json

@@ -1,16 +0,0 @@
-{
-  "images" : [
-    {
-      "filename" : "MarkAllAsReadPDF.pdf",
-      "idiom" : "universal"
-    }
-  ],
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  },
-  "properties" : {
-    "preserves-vector-representation" : true,
-    "template-rendering-intent" : "template"
-  }
-}

Multiplatform/Shared/Assets.xcassets/MarkAllAsReadPNG.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "mark-all-as-read.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Multiplatform/Shared/SceneNavigationView.swift

@@ -94,10 +94,8 @@ struct SceneNavigationView: View {
 				Button {
 					sceneModel.markAllAsRead()
 				} label: {
-					AppAssets.markAllAsReadImagePDF
-						.resizable()
-						.scaledToFit()
-						.frame(width: 20, height: 20, alignment: .center)
+					AppAssets.markAllAsReadImagePNG
+						.offset(y: 7)
 				}
 				.disabled(sceneModel.markAllAsReadButtonState == nil)
 				.help("Mark All as Read")