### 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
int col_pos = 0;
		while (true) {
			col_pos = is_case_sensitive() ? line_text.find(searched, col_pos) : line_text.findn(searched, col_pos);
			if (col_pos == -1) {
				break;
			}
			if (is_whole_words()) {
				if (col_pos > 0 && !is_symbol(line_text[col_pos - 1])) {
					col_pos += searched.length();
					continue;
				}
				if (col_pos + searched.length() < line_text.length() && !is_symbol(line_text[col_pos + searched.length()])) {
					col_pos += searched.length();
					continue;
				}
			}
			results_count++;
			if (i == result_line) {
				if (col_pos == result_col) {
					results_count_to_current = results_count;
				} else if (col_pos < result_col && col_pos + searched.length() > result_col) {
					col_pos = result_col;
					results_count_to_current = results_count;
				}
			}
			col_pos += searched.length();
		}
	}
}
void FindReplaceBar::_update_matches_label() {