touchy: open inifile once only
touchy: allow alternate gladefile

with ini entry: [DISPLAY]GLADEFILE
Fix resolver indexing properly.

The previous attempt to sort out resolver "index" for multi-turn resolvers was 100% successful.
Unfortunately it meant that single-turn resolvers only indexed in one direction.
This commit should mean that both types now work properly.

Signed-off-by: Andy Pugh <andy@bodgesoc.org>