Fullscreen support for shader editor

[shahriarlabib000]

I think devices with smaller screens like Android devices will benefit from it.
gdscript editor already has a Fullscreen mode maybe something like that.It will especially help when code line gets long.
here is how much room i get to write code as of 4.3.stable

[AThousandShips]

Thank you for your proposal, consolidating in:

• Move Shader Editor from Bottom Panel to Script Editor #5071

[shahriarlabib000]

to clarify, I didn't propose to combine shader editor and gdscript editor. I just suggested to
add a Fullscreen mode to the existing shader editor

[AThousandShips]

Thank you for clarifying, I think it falls under the same scope but good to add that as a suggestion over there