Formatting actions of the toolbar buttons appear next to the cursor placement instead of the actual selected text

Steps to reproduce

1. Start an XWiki 17.10.0 instance (I've tested by upgrading the Syntax Highlighting Application to 4.10.3)
2. Edit a page in Wiki mode (e.g. Sandbox)
3. Select a word
4. Click on any button from the toolbar (e.g. Bold, Italic, etc)

Expected results

The respective word is formatted as intended, e.g. for 'Bold' the syntax would be:

**word**

Actual results

Instead of formatting the actual selected text, the formatting appear next to the word, as it is, e.g. for 'Bold' the syntax actually is:

word**Text in Bold**