Fix keyboard layout icon in taskbar notification area. JIRA issue: CORE-11700, CORE-2699, CORE-18546
- Call ActivateKeyboardLayout to select the keyboard layout correctly.
- Modify WM_INPUTLANGCHANGEREQUEST parameter.
- Modify BroadcastSystemMessageW parameter.
- Revert Taskbar Notification Area MA_NOACTIVATE HACK 8344291 . This fixes Context Menu display.
- Load the "IME File" value and set the IME icon if necessary.
- Correctly implement global hooks.