Commented Issue: How to prevent ApplyPropertyValue from setting the focus to RichTextBox? [19480]

Based on discussion 437034.

Typing fontSize in the RichTextFormatBar only set the size of the text to the first input character and then set the focus in the RichTextBox. Then the second input character is typed in the RichTextBox.
Comments: ** Comment from web user: BoucherS **

same as issue https://wpftoolkit.codeplex.com/workitem/19809