remove background of vips_output in tabs, re #53

css/vips.css

@@ -165,6 +165,10 @@ button.vips_file_upload:hover {
     font-family: monospace;
 }
 
+.vips_tabs .vips_output {
+    background: none;
+}
+
 .vips_output {
     background-color: #f5f6f6;
     background-color: var(--dark-gray-color-5, #f5f6f6);