Expose EditorFileDialog::popup_file_dialog() to GDScript and GDExtension

Author: dsnopek

doc/classes/EditorFileDialog.xml

@@ -90,6 +90,12 @@
 				Notify the [EditorFileDialog] that its view of the data is no longer accurate. Updates the view contents on next view update.
 			</description>
 		</method>
+		<method name="popup_file_dialog">
+			<return type="void" />
+			<description>
+				Shows the [EditorFileDialog] at the default size and position for file dialogs in the editor, and selects the file name if there is a current file.
+			</description>
+		</method>
 		<method name="set_option_default">
 			<return type="void" />
 			<param index="0" name="option" type="int" />

editor/gui/editor_file_dialog.cpp

@@ -1929,6 +1929,7 @@ void EditorFileDialog::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_disable_overwrite_warning", "disable"), &EditorFileDialog::set_disable_overwrite_warning);
 	ClassDB::bind_method(D_METHOD("is_overwrite_warning_disabled"), &EditorFileDialog::is_overwrite_warning_disabled);
 	ClassDB::bind_method(D_METHOD("add_side_menu", "menu", "title"), &EditorFileDialog::add_side_menu, DEFVAL(""));
+	ClassDB::bind_method(D_METHOD("popup_file_dialog"), &EditorFileDialog::popup_file_dialog);
 
 	ClassDB::bind_method(D_METHOD("invalidate"), &EditorFileDialog::invalidate);