patch ifdefs out msg handling of IME messages on WINCE. This also reduces the differences between wince and win32 wrt to style and default window icon handling. wince only r=dveditz b=297683 git-svn-id: svn://10.0.0.236/branches/MOZILLA_1_8_BRANCH@194613 18797224-902f-48f8-a5cc-f745e15eee43