Size topic avatar

Ok so I tried this and it worked quite nicely. Here is what I did:

  1. created a theme and made it a component for my default theme

  2. defined an enum setting in the component theme and gave it some values to choose from

  3. added this piece of code in Common >> </head>:

<script type="text/discourse-plugin" version="0.4">
    api.changeWidgetSetting('post-avatar', 'size', Discourse.ThemeSettings.topic_avatars_size);
</script>
  1. and this piece in Common >> CSS
.topic-avatar {
    width: #{$topic_avatars_size}px; /* from theme settings */
}

And I got this (80px avatars):

Changed the setting to 100px, reloaded the page and got 100px avatars:

My PR for theme settings doesn’t have this - if you want this in I’ll push my changes after I polish my code a bit and write some tests.