QuickDapp Change UI for optional logo input

[ryestew]

Currently if no logo is chosen then the user thinks that it is required to use the Remix logo. Only when you hover on the Remix logo do you see the instructions. But if they don't have a logo - they are stuck.

Right now the UI looks like this:

A rough sketch of the UI should be more like this:

[ryestew]

I've assigned this to @drafish

[Aniket-Engg]

closed by https://github.com/ethereum/remix-project/pull/5376