### Godot version

v4.0.beta14.official

### System information

Windows 11 22H2

### Issue description

There's not much to it, simply noticed that if you have Find or Find+Replace opened in the Script Editor, the Multi-Caret functionality seems to stop working -- forcibly removing all other carets after the first character is typed. I'd expect the Multi-Caret to remain until unselected by clicking elsewhere.

The content of what's in "Find" doesn't matter, it happens regardless.

https://user-images.githubusercontent.com/8159582/214234069-cbcc1681-3f09-4b10-9a90-857cc91d41a7.mp4



### Steps to reproduce

1. Open the Find or Find+Replace tool in the Script Editor _(nothing has to be inputted)_
2. Add multiple mouse cursors with Ctrl+Alt+Click **OR** highlight something and then highlight additional duplicates with Ctrl+D _(or synonymous keyboard shortcuts depending on OS)_.
3. Start typing as if going to add or replace in all locations where the multi-caret is

### Minimal reproduction project

N/A
if (i == end) {
				len = end_col;
			}
			if (i == begin) {
				len -= begin_col;
			}
			String new_line = text_editor->get_line(i).substr(i == begin ? begin_col : 0, len);
			switch (p_case) {
				case UPPER: {
					new_line = new_line.to_upper();
				} break;
				case LOWER: {
					new_line = new_line.to_lower();
				} break;
				case CAPITALIZE: {
					new_line = new_line.capitalize();
				} break;
			}
			if (i == begin) {
				new_line = text_editor->get_line(i).left(begin_col) + new_line;
			}
			if (i == end) {
				new_line = new_line + text_editor->get_line(i).substr(end_col);
			}
			text_editor->set_line(i, new_line);
		}
	}
	text_editor->end_complex_operation();
}
void CodeTextEditor::move_lines_up() {