Is your feature request related to a problem? Please describe.
Some servers have custom resource packs that use different heights for their GUI/HUD elements. Also, some mods change some visual GUI/HUD elements. It makes it so the chat window is sometimes still blocking certain GUI/HUD elements, even with the 'Shift chat interface' option turned on.

Describe the solution you'd like
A slider or ability to enter a numerical value of the pixels that the chat interface should offset vertically. Maybe have the default be the 'about 10' so that option works best for Vanilla gameplay.

Describe alternatives you've considered
There's almost no other mods that do this as for as I know. I've only seen AdvancedChat that makes u move the chat window however you please, but that one makes things far more complicated than it has to be.

Additional context
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