Allows viewing unsupported updates from My Apps tab

When unsupported updates are available, the “No Updates Available” text becomes “Unsupported Updates Available”, and a button is revealed that will list all unsupported updates in an alert when tapped.

AltStore/Resources/Assets.xcassets/ellipsis.circle.symbolset/Contents.json

@@ -0,0 +1,15 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  },
+  "properties" : {
+    "symbol-rendering-intent" : "template"
+  },
+  "symbols" : [
+    {
+      "filename" : "ellipsis.circle.svg",
+      "idiom" : "universal"
+    }
+  ]
+}