Do not use VIQR input method for vi locale by default

In the Vietnamese Quoted-Readable input method, punctuation following a base letter is converted into diacritical marks, for example a( → ă. (See https://en.wikipedia.org/wiki/Vietnamese_Quoted-Readable.) A 2008 bug report in Ubuntu argued that this is a problematic default, particularly when typing passwords, where the effect of the punctuation is non-obvious.

According to the bug reporter, VIQR is popular with Vietnamese users living elsewhere in the world, where Vietnamese keyboards are unlikely to be readily available, but is not a popular choice within Vietnam, where the Telex or VNI input modes are preferred.

Closes: #183 (closed)

Bug-Debian: https://bugs.debian.org/895043 Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/gtk+2.0/+bug/191451

Signed-off-by: Emmanuele Bassi ebassi@gnome.org