Page title is incorrectly displayed under page tree if the title has patterns( ../ or ..\)

Issue Summary

This is reproducible on Data Center: (yes)

If the page title contains one of the following character sets after saving the page the page title in the page tree is incorrectly displayed

../ 
..\ 
.../ 
...\

Steps to Reproduce

1. Create a fresh instance with Confluence 7.19.18 or 7.19.19
2. Create a new page with a title having a pattern (../ or ..) 
3. Save the page and check the page tree where the title is not displayed correctly.

Expected Results

The page title must be displayed properly.

Actual Results

Workaround

NA