We'll create fresh WordPress site with Quick Save installed. You have 20 minutes to test the plugin after that site we'll be deleted.
When editing in Text mode the Quick Save WordPress plugin lets you update posts and pages using keystrokes as well as by clicking the Publish/Update button.
By default the ALT key is used to save posts/pages however you can change this from the Settings menu if you have the Pro version.
See Quick Save Keystroke in Settings menu for more information.
The plugin is available in English: