Improve relationship UI handling (#42)

* Added tabbed view; improved relationships for media profile

* Adds new maybe_limit method for queries

* Improves UI for media items, associated tasks

lib/pinchflat/repo.ex

@@ -3,6 +3,8 @@ defmodule Pinchflat.Repo do
     otp_app: :pinchflat,
     adapter: Ecto.Adapters.SQLite3
 
+  import Ecto.Query, warn: false
+
   @doc """
   It's not immediately obvious if an Oban job qualifies as unique, so this method
   attempts creating a job and checks for the `conflict?` field in the returned job.
@@ -16,4 +18,13 @@ defmodule Pinchflat.Repo do
       err -> err
     end
   end
+
+  @doc """
+  Applies a limit to a query if provided, otherwise returns the query as-is.
+
+  Returns %Ecto.Query{}.
+  """
+  def maybe_limit(query, limit) do
+    if limit, do: limit(query, ^limit), else: query
+  end
 end