Add scene/image/gallery popover count buttons for performer/studio/tag cards (#1293)

* Add counts to graphql schema
* Add count resolvers and query refactor
* Add count popover buttons

pkg/sqlite/image_test.go

@@ -95,6 +95,12 @@ func imageQueryQ(t *testing.T, sqb models.ImageReader, q string, expectedImageId
 	image := images[0]
 	assert.Equal(t, imageIDs[expectedImageIdx], image.ID)
 
+	count, err := sqb.QueryCount(nil, &filter)
+	if err != nil {
+		t.Errorf("Error querying image: %s", err.Error())
+	}
+	assert.Equal(t, len(images), count)
+
 	// no Q should return all results
 	filter.Q = nil
 	images, _, err = sqb.Query(nil, &filter)