Add Organise pages button to the edit set page

app/templates/sets/edit.html

@@ -165,6 +165,29 @@
             </div>
         </div>
         
+        {% set image_pages = set.image_instructions %}
+        {% if image_pages %}
+            <div class="card shadow mt-4">
+                <div class="card-header bg-light">
+                    <h5 class="mb-0"><i class="bi bi-arrows-move"></i> Page Order</h5>
+                </div>
+                <div class="card-body">
+                    <p>
+                        This set has {{ image_pages|length }} image page{% if image_pages|length != 1 %}s{% endif %}.
+                        Drag them into the right order, or sort the whole lot by
+                        filename in one go.
+                    </p>
+                    <a href="{{ url_for('instructions.organise', set_id=set.id) }}"
+                       class="btn btn-outline-primary">
+                        <i class="bi bi-arrows-move"></i> Organise pages
+                    </a>
+                    <div class="form-text mt-2">
+                        Opens a separate page, so save any changes above first.
+                    </div>
+                </div>
+            </div>
+        {% endif %}
+        
         <div class="card shadow mt-4">
             <div class="card-header bg-light">
                 <h5 class="mb-0"><i class="bi bi-info-circle"></i> Set Information</h5>