Add ability to make variant from template

InvenTree/part/templates/part/variant_part.html

@@ -0,0 +1,12 @@
+{% extends "modal_form.html" %}
+
+{% block pre_form_content %}
+
+{{ block.super }}
+
+<div class='alert alert-info alert-block'>
+    <b>Create new part variant</b><br>
+    Create a new variant of template <i>'{{ part.full_name }}'</i>.
+</div>
+
+{% endblock %}

InvenTree/part/templates/part/variants.html

@@ -60,4 +60,13 @@
         sortable: true,
     });
 
+    $('#new-variant').click(function() {
+        launchModalForm(
+            "{% url 'make-part-variant' part.id %}",
+            {
+                follow: true,
+            }
+        );
+    });
+
 {% endblock %}