Revised HTML element for onboarding logo

Added navbar class to the parent header of the onboarding logo and removed the previously appended icon class from the image.

bookwyrm/templates/get_started/layout.html

@@ -9,9 +9,9 @@
 <div class="modal is-active" role="dialog" aria-modal="true" aria-labelledby="get_started_header">
     <div class="modal-background"></div>
     <div class="modal-card is-fullwidth">
-        <header class="modal-card-head">
+        <header class="modal-card-head navbar">
             <img
-                class="image logo mr-2 icon is-large"
+                class="image logo mr-2"
                 src="{% if site.logo_small %}{% get_media_prefix %}{{ site.logo_small }}{% else %}{% static "images/logo-small.png" %}{% endif %}"
                 aria-hidden="true"
                 alt="{{ site.name }}"