Bug 415495 - typedef/type alias change code completion proposals

Change-Id: I963ff5fc2ae073f233b04eb6a5a521d0e6610af7
Signed-off-by: Michi <woskimi@yahoo.de>
Reviewed-on: https://git.eclipse.org/r/38029
Reviewed-by: Sergey Prigogin <eclipse.sprigogin@gmail.com>
Tested-by: Sergey Prigogin <eclipse.sprigogin@gmail.com>