Add a luxurious backend admin page for the SemanticQuery model (#486)

backend/items/admin.py

@@ -1,3 +1,19 @@
 from django.contrib import admin
 
-# Register your models here.
+from .models import SemanticQuery
+
+
+@admin.register(SemanticQuery)
+class SemanticQueryAdmin(admin.ModelAdmin):
+    date_hierarchy = 'created'
+    fields = ('label', 'creator', 'created', 'query')
+    readonly_fields = ('created', 'query')
+    autocomplete_fields = ('creator',)
+    search_fields = ('label',)
+    list_display = ('id', 'label', 'creator', 'created')
+    list_display_links = ('id', 'label')
+    list_filter = ('created', 'creator')
+    show_full_result_count = False
+
+    def view_on_site(self, obj):
+        return '/explore/query/{}'.format(obj.id)