It was checked but I had no ways of achieving it after having an extensive research about it.
So, I have gone with Chrome Extension to dynamically edit the page using JQuery with CSS and use NodeJS as a Web-Service to fetch the desired images by sending them as base64 encoded data through requests.
It is now working almost as what I expected but it is acceptable for the moment.
I might develop it more in the future since it obviously extends the opportunities of customizing the LN WebUI on the top layer for clients.
See attachment for the result.