hide opted-out instances from table

backend/lib/backend/api.ex

@@ -9,7 +9,7 @@ defmodule Backend.Api do
   @spec get_instances(Integer.t() | nil) :: Scrivener.Page.t()
   def get_instances(page \\ nil) do
     Instance
-    |> where([i], not is_nil(i.type))
+    |> where([i], not is_nil(i.type) and not i.opt_out)
     |> Repo.paginate(page: page)
   end
 

frontend/src/components/organisms/InstanceTable.tsx

@@ -78,7 +78,7 @@ class InstanceTable extends React.PureComponent<IInstanceTableProps> {
         <PaginationContainer>
           <p>
             Showing {(currentPage - 1) * pageSize + 1}-{Math.min(currentPage * pageSize, totalEntries)} of{" "}
-            {totalEntries} known instances
+            {totalEntries} known active instances
           </p>
 
           <ButtonGroup>