UIbuilder .ico - how to replace

Maybe a minor point, but how to replace the /uibuilder/common/images/node-blue.ico ?
In the template

    <title>Blank template - Node-RED uibuilder</title>
    <meta name="description" content="Node-RED uibuilder - Blank template">
    <link rel="icon" href="./images/node-blue2.ico">

it is specified and works.
But even a copy of that icon with e.g. /node-blue2.ico does not show the blue UIbuilder icon anymore! And no other .ico do!?

Hi, if you want your own image, you can put it into <uibRoot>/common/ or into your instance src folder.

I like to keep such things in an images sub-folder but some people prefer to use assets, it doesn't really matter.

Lets say you have a standard Node-RED and uibuilder install and an uibuilder instance named test.

~/.node-red/uibuilder/common/ maps to the URL ../uibuilder/common/

~/.node-red/uibuilder/test/src/ maps to the URL ./.