Steps to Reproduce:
--Install Bopomofo or Quick input method (Traditional Chinese).
--Open the Telerik SyntaxEditor in a WPF application.
--In any text input field, enter an Alt code (e.g., Alt+0160 for a non-breaking space).
--Attempt to type any Chinese characters immediately after entering the Alt code.

Current Behavior:
  -Bopomofo IME:
    -- The user cannot type any Chinese characters after entering an Alt code.
    -- Switching the language (e.g., pressing Shift) allows English input, but Chinese input remains blocked.

Quick IME:
   -The input method automatically switches to English after entering an Alt code.
   -The language indicator still shows Chinese, but characters typed are in English.
   T-o resume Chinese input, the user must click another text field, alt-tab to another window, then return.

Expected Behavior:
   -Users should be able to continue typing Chinese characters after entering Alt codes without needing to manually switch inputs.
   -The IME state should remain consistent, allowing uninterrupted input.