### Godot version

4.0 beta 15

### System information

Windows 10

### Issue description

It happened with both Google IME and MS-IME, and there was no problem until Beta14.
When typing Japanese characters, it is common to select a character from the suggestion window and then start typing the next character before confirming.
In this case, uncommitted characters are forcibly committed, and input of the next character begins.

**↓Beta15**

https://user-images.githubusercontent.com/186786/214753450-b493cca6-2644-4b3d-8cd2-660565cc3547.mp4

**↓Beta14**

https://user-images.githubusercontent.com/186786/214755127-dde819cc-4d63-403a-99b0-09821671f74e.mp4



### Steps to reproduce

It happened with both Google IME and MS-IME in beta15

### Minimal reproduction project

It is project independent and happens in the editor.
for (int c = words.size() - 2; c >= 0; c = c - 2) {
					if (words[c] < column) {
						column = words[c];
						break;
					}
				}
			}
			
			int overlapping_caret_index = -1;
			for (int j = i + 1; j < caret_edit_order.size(); j++) {
				
				if (get_caret_line(caret_edit_order[j]) != get_caret_line(caret_idx) && (!has_selection(caret_edit_order[j]) || get_selection_to_line(caret_edit_order[j]) != get_caret_line(caret_idx))) {
					break;
				}
				
				if ((has_selection(caret_edit_order[j]) && get_selection_to_column(caret_edit_order[j]) < column)) {
					break;
				}
				
				if ((has_selection(caret_edit_order[j]) && get_selection_from_column(caret_edit_order[j]) < column)) {
					carets.write[caret_edit_order[j]].selection.to_column = column;
					overlapping_caret_index = caret_edit_order[j];
					break;
				}
				
				if (get_caret_column(caret_edit_order[j]) > column || (has_selection(caret_edit_order[j]) && get_selection_from_column(caret_edit_order[j]) > column)) {
					deselect(caret_edit_order[j]);
					carets_to_remove.push_back(caret_edit_order[j]);
					set_caret_column(0, caret_idx == 0, caret_idx);
					i = j;