Show warning icon on errors

app/src/main/java/eu/faircode/email/AdapterFolder.java

@@ -213,14 +213,14 @@ public class AdapterFolder extends RecyclerView.Adapter<AdapterFolder.ViewHolder
                 else if (folder.state == null)
                     ivState.setImageResource(R.drawable.baseline_cloud_off_24);
                 else
-                    ivState.setImageResource(android.R.drawable.stat_sys_warning);
+                    ivState.setImageResource(R.drawable.baseline_warning_24);
             } else {
                 if ("syncing".equals(folder.sync_state))
                     ivState.setImageResource(R.drawable.baseline_compare_arrows_24);
                 else if ("downloading".equals(folder.sync_state))
                     ivState.setImageResource(R.drawable.baseline_cloud_download_24);
                 else
-                    ivState.setImageResource(android.R.drawable.stat_sys_warning);
+                    ivState.setImageResource(R.drawable.baseline_warning_24);
             }
             ivState.setVisibility(
                     folder.synchronize || folder.state != null || folder.sync_state != null

app/src/main/java/eu/faircode/email/AdapterNavAccount.java

@@ -70,9 +70,13 @@ public class AdapterNavAccount extends RecyclerView.Adapter<AdapterNavAccount.Vi
         }
 
         private void bindTo(TupleAccountEx account) {
+            if (account.error == null)
                 ivItem.setImageResource("connected".equals(account.state)
                         ? account.primary ? R.drawable.baseline_folder_special_24 : R.drawable.baseline_folder_24
                         : R.drawable.baseline_folder_open_24);
+            else
+                ivItem.setImageResource(R.drawable.baseline_warning_24);
+
             if (account.color == null)
                 ivItem.clearColorFilter();
             else

app/src/main/java/eu/faircode/email/AdapterNavFolder.java

@@ -74,6 +74,7 @@ public class AdapterNavFolder extends RecyclerView.Adapter<AdapterNavFolder.View
         }
 
         private void bindTo(TupleFolderNav folder) {
+            if (folder.error == null)
                 if (EntityFolder.OUTBOX.equals(folder.type)) {
                     if ("syncing".equals(folder.sync_state))
                         ivItem.setImageResource(R.drawable.baseline_compare_arrows_24);
@@ -96,6 +97,8 @@ public class AdapterNavFolder extends RecyclerView.Adapter<AdapterNavFolder.View
                     else
                         ivItem.setColorFilter(folder.color);
                 }
+            else
+                ivItem.setImageResource(R.drawable.baseline_warning_24);
 
             int count = (EntityFolder.OUTBOX.equals(folder.type) ? folder.operations : folder.unseen);