Add more customization for gui element

Not applicable
Issue description

So for my mod Restart, I want to make a book and quill style item. But currently, when you make a text input item, It shows up with a black background and isn't resizeable. Can you please make the text input element more customize-able ( ability to resize or change the background.)


Issue comments

i have tried that (probably just a device problem ). The other items on my list still stand... will they be added in 2020.5? 

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