Merge branch 'feature/markdown-enable-tags' into 'develop'

common api: enable tag linking in markdown mode

Closes #322

See merge request pleroma/pleroma!376

lib/pleroma/web/common_api/utils.ex

@@ -126,6 +126,7 @@ def format_input(text, mentions, tags, "text/markdown") do
     |> String.replace(~r/\r?\n/, "")
     |> (&{[], &1}).()
     |> Formatter.add_user_links(mentions)
+    |> Formatter.add_hashtag_links(tags)
     |> Formatter.finalize()
   end