Expose has_undo() and has_redo() of LineEdit

doc/classes/LineEdit.xml

@@ -151,12 +151,24 @@
 				Returns [code]true[/code] if the user has text in the [url=https://en.wikipedia.org/wiki/Input_method]Input Method Editor[/url] (IME).
 			</description>
 		</method>
+		<method name="has_redo" qualifiers="const">
+			<return type="bool" />
+			<description>
+				Returns [code]true[/code] if a "redo" action is available.
+			</description>
+		</method>
 		<method name="has_selection" qualifiers="const">
 			<return type="bool" />
 			<description>
 				Returns [code]true[/code] if the user has selected text.
 			</description>
 		</method>
+		<method name="has_undo" qualifiers="const">
+			<return type="bool" />
+			<description>
+				Returns [code]true[/code] if an "undo" action is available.
+			</description>
+		</method>
 		<method name="insert_text_at_caret">
 			<return type="void" />
 			<param index="0" name="text" type="String" />

scene/gui/line_edit.cpp

@@ -2763,6 +2763,8 @@ void LineEdit::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("select", "from", "to"), &LineEdit::select, DEFVAL(0), DEFVAL(-1));
 	ClassDB::bind_method(D_METHOD("select_all"), &LineEdit::select_all);
 	ClassDB::bind_method(D_METHOD("deselect"), &LineEdit::deselect);
+	ClassDB::bind_method(D_METHOD("has_undo"), &LineEdit::has_undo);
+	ClassDB::bind_method(D_METHOD("has_redo"), &LineEdit::has_redo);
 	ClassDB::bind_method(D_METHOD("has_selection"), &LineEdit::has_selection);
 	ClassDB::bind_method(D_METHOD("get_selected_text"), &LineEdit::get_selected_text);
 	ClassDB::bind_method(D_METHOD("get_selection_from_column"), &LineEdit::get_selection_from_column);