### Godot version

v4.0.beta.custom_build [13f0158]

### System information

Windows 10

### Issue description

When doing operations (`begin_complex_operation` and `end_complex_operation`) with multiple selections in TextEdit, some of these selections don't revert upon undo. This behavior is affects some of script editor's operations, like duplicate selection and delete lines.

### Steps to reproduce

Open script editor, make multiple selections. Keep in mind what you have selected. Do duplicate selection (ctrl+shift+D). Undo (ctrl+Z). Compare the result to what you remember.

### Minimal reproduction project

N/A
if (k->is_action("ui_text_select_all", true)) {
				select_all();
				accept_event();
				return;
			}
			if (k->is_action("ui_text_select_word_under_caret", true)) {
				select_word_under_caret();
				accept_event();
				return;
			}
			if (k->is_action("ui_text_add_selection_for_next_occurrence", true)) {
				add_selection_for_next_occurrence();
				accept_event();
				return;
			}
			if (k->is_action("ui_text_clear_carets_and_selection", true)) {
				
				if (_clear_carets_and_selection()) {
					accept_event();
					return;
				}
			}
			if (k->is_action("ui_cut", true)) {
				cut();
				accept_event();
				return;
			}
			if (k->is_action("ui_copy", true)) {
				copy();
				accept_event();