Add the FindReplaceBar to the CodeEdit.

[BrotherShort]

I'm developing a desktop GUI custom texteditor software on Godot engine. I need a TextEditor control. Godot's TextEdit/CodeEdit controls are good. They provide cut, copy, parse features, but no find or replace.

Godot Editor has a CodeTextEditor with a FindReplaceBar. But the FindReplaceBar control is not released to developers.

In current version structure, the FindReplaceBar class is a class in editor project, not a class in core GUI control classes. The CodeTextEditor has a CodeEdit value and a FindReplaceBar value as member values.

I think we could make FindReplaceBar be a part of CodeEdit, so developers can use the FindReplaceBar in their projects.

[sockeye-d]

When I needed a find and replace bar I just made my own. I wanted it to support regex as well, so I wouldn't have been able to take advantage of the built in one anyway. I think that since your needs might vary from the built-in one, it's easier just to not force it on users and try to get them to find a way to disable the built-in one