Facilitate left menu logo change

As a Studio user,
I want to be able to handle a left menu logo for my theme in a dedicated theme option
So that I don't need to know how themes work behind the scenes

AC
When I create a theme, a new "left menu logo (png)" option is available, similar to the screenshot one, below the screenshot option
I can upload ot change the file to use by clicking the preview
When I upload a file, only png files are accepted
When the file is uploaded, I see a preview of it and it is renamed if necessary
I can delete the file by clicking a trash icon close to the preview (similar to the resources)