significant expansion of scss styling, incl. new _dashboard.scss sheet & comprehensive primary btn theme synced w. user palette; changes to all other scss files; list.html & base.html retrofitted w. corresponding scss classes

src/templates/apps/dashboard/list.html

@@ -41,7 +41,7 @@
                     </div>
                 {% endif %}
 
-                <button type="submit" class="btn btn-primary">Share</button>
+                <button type="submit" class="btn btn-primary btn-xl">Share</button>
             </form>
             <small>List shared with:
                 {% for user in list.shared_with.all %}

src/templates/core/base.html

@@ -28,7 +28,7 @@
                         <span class="navbar-text">Logged in as {{ user|display_name }}</span>
                         <form method="POST" action="{% url "logout" %}">
                             {% csrf_token %}
-                            <button id="id_logout" class="btn btn-outline-secondary" type="submit">
+                            <button id="id_logout" class="btn btn-primary btn-xl" type="submit">
                                 Log Out
                             </button>
                         </form>