Unable to type the ś character in the Page Title using Polish keyboard due to AltGr + S Keyboard Shortcut

Steps to Reproduce:

1. Add the Polish Keyboard Layout to Windows via Control Panel >> Region and Language >> Keyboard and Languages >> Change Keyboards and set it as the Default input language
2. Launch the On-Screen Keyboard via Start >> Accessories >> Ease of Access >> On-Screen Keyboard
3. Launch a web browser and attempt to add a page to Confluence
4. In the Editor, try to insert the ś character into the Page Title (via AltGr + S , using the On-Screen keyboard), and notice that instead of adding that character, the page is saved instead (Interpreted as a Ctrl + S shortcut)

Fixed in Confluence 5.x

Tested on Confluence 5.1.2. Issue cannot be reproduced in that version