Keystrokes lost when editor suggestion popup is displayed.

When typing the namespace-qualified name of a class, keystrokes are lost when the suggestion box pops up. This forces typists to use the mouse when it would be more efficient, and ergonomic, to keep hands on the keyboard. For example, when typing the name of the class "std::stringstream", the editor will show "std::tringstream" because the "s" keystroke was lost.