LineEdit/TextEdit: solved control + alt issue

(cherry picked from commit f412237f380d0590bed6bc89443fb6fa2bbe740d)

scene/gui/line_edit.cpp

@@ -567,7 +567,7 @@ void LineEdit::_gui_input(Ref<InputEvent> p_event) {
 
 			if (handled) {
 				accept_event();
-			} else if (!k->get_command()) {
+			} else if (!k->get_command() || (k->get_command() && k->get_alt())) {
 				if (k->get_unicode() >= 32 && k->get_scancode() != KEY_DELETE) {
 
 					if (editable) {

scene/gui/text_edit.cpp

@@ -3735,7 +3735,7 @@ void TextEdit::_gui_input(const Ref<InputEvent> &p_gui_input) {
 			return;
 		}
 
-		if (!scancode_handled && !k->get_command()) { // For German keyboards.
+		if (!scancode_handled && (!k->get_command() || (k->get_command() && k->get_alt()))) { // For German keyboards.
 
 			if (k->get_unicode() >= 32) {