Add 'variant' field to Part model

- Display 'long_name' which is concatenation of name and variant

InvenTree/part/templates/part/part_app_base.html

@@ -4,7 +4,7 @@
 
 {% block page_title %}
 {% if part %}
-InvenTree | Part - {{ part.name }}
+InvenTree | Part - {{ part.long_name }}
 {% elif category %}
 InvenTree | Part Category - {{ category }}
 {% else %}

InvenTree/part/templates/part/part_base.html

@@ -7,7 +7,7 @@
 <div class="row">
     {% if part.active == False %}
     <div class='alert alert-danger' style='display: block;'>
-        This part ({{ part.name }}) is not active:
+        This part ({{ part.long_name }}) is not active:
     </div>
     {% endif %}
 <div class="col-sm-6">
@@ -24,8 +24,11 @@
       </div>
     <div class="media-body">
         <h4>
-            {{ part.name }}
+            {{ part.long_name }}
         </h4>   
+        {% if part.variant %}
+        <p>Variant: {{ part.variant }}</p>
+        {% endif %}
         <p><i>{{ part.description }}</i></p>
         <p>
             <div class='btn-group'>

InvenTree/part/templates/part/partial_delete.html

@@ -1,4 +1,4 @@
-Are you sure you want to delete part '{{ part.name }}'?
+Are you sure you want to delete part '{{ part.long_name }}'?
 
 {% if part.used_in_count %}
 <p>This part is used in BOMs for {{ part.used_in_count }} other parts. If you delete this part, the BOMs for the following parts will be updated:
@@ -30,5 +30,5 @@ Are you sure you want to delete part '{{ part.name }}'?
 {% endif %}
 
 {% if part.serials.all|length > 0 %}
-<p>There are {{ part.serials.all|length }} unique parts tracked for '{{ part.name }}'. Deleting this part will permanently remove this tracking information.</p>
+<p>There are {{ part.serials.all|length }} unique parts tracked for '{{ part.long_name }}'. Deleting this part will permanently remove this tracking information.</p>
 {% endif %}

InvenTree/part/templates/part/supplier.html

@@ -48,7 +48,7 @@
     $("#supplier-table").bootstrapTable({
         sortable: true,
         search: true,
-        formatNoMatches: function() { return "No supplier parts available for {{ part.name }}"; },
+        formatNoMatches: function() { return "No supplier parts available for {{ part.long_name }}"; },
         queryParams: function(p) {
             return {
                 part: {{ part.id }}

InvenTree/part/templates/part/track.html

@@ -4,7 +4,7 @@
 
 {% include 'part/tabs.html' with tab='track' %}
 
-Part tracking for {{ part.name }}
+Part tracking for {{ part.long_name }}
 
 <table class="table table-striped">
 <tr>