subscription list+view

flutter/lib/utils/navi.dart

@@ -32,6 +32,10 @@ class Navi {
   static void popDialog(BuildContext dialogContext) {
     Navigator.pop(dialogContext);
   }
+
+  static void pop(BuildContext context) {
+    Navigator.of(context).pop();
+  }
 }
 
 class SCNRouteObserver extends RouteObserver<PageRoute<dynamic>> {

flutter/lib/utils/ui.dart

@@ -130,7 +130,10 @@ class UI {
       padding: EdgeInsets.fromLTRB(16, 2, 4, 2),
       child: Row(
         children: [
-          FaIcon(icon, size: 18),
+          ConstrainedBox(
+            constraints: new BoxConstraints(minWidth: 18.0),
+            child: Center(child: FaIcon(icon, size: 18)),
+          ),
           SizedBox(width: 16),
           Expanded(
             child: Column(