Long words in page titles cause overflow in Activity Stream and are not displayed properly in Notifications list

STEPS TO REPRODUCE

1. Create an user (e.g. U1) having Pages Notifications set to ON and watching the wiki
2. Login as Admin
3. Create a page with a long single word title (e.g. ttttttttttttttttttttttttttttttt1ttttttttttttttttttttttttttttttt2ttttttttttttttttttttttttttttttt3ttttttttttttttttttttttttttttttt4ttttttttttttttttttttttttttttttt5ttttttttttttttttttttttttttttttt6ttttttttttttttttttttttttttttttt7tttttttttttttttttt245)
4. Login as U1
5. Open the Notifications list
6. Go to Dashboard and observe the Activity Stream

EXPECTED RESULTS

The long word from page title is truncated (maybe hyphenated, or first part of it displayed with 3 continuation points added "..." at the end) to fit into Activity Stream, respectively within Notifications list width.

ACTUAL RESULTS

The long word title is displayed in a single line and causes overflow in Activity Stream.

In Notifications list it's displayed partially in a single line (as much as it fits in the list width).