Add image for currency settings.

Trust/Assets.xcassets/settings-currency.imageset/Contents.json

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

Trust/Settings/ViewControllers/SettingsViewController.swift

@@ -93,7 +93,7 @@ class SettingsViewController: FormViewController {
             }.onPresent { _, selectorController in
                 selectorController.enableDeselection = false
             }.cellSetup { cell, _ in
-                cell.imageView?.image = R.image.settings_server()
+                cell.imageView?.image = R.image.settingsCurrency()
             }
 
             <<< AppFormAppearance.button { button in