When the position on which the users right-click is an annotation start or end marker, the context menu doesn't provide suggestions about spellcheck errors.

Steps to reproduce:

1. Type "The greater the better" in RadRichTextBox with enabled spellchecking
2. Turn on track changes
3. Move the caret to the 't' of "greater"
4. Insert 't' so the word becomes wrong
5. Right-click on the 't' letter inserted in step 4

Observed: The context menu doesn't show suggestions for fixing the misspelled word
Expected: The context menu should suggest a fix