[Evolution] PreviewPane accelerator

["Francisco Javier F. Serrador" <franciscojavier fernandez serrador hispalinux es>]

There is a problem with the current accelerator on non-English
keyboards. Actually we are making a county-wide deployment of evolution
in a Spanish location environment, and the Preview panel is unuseable.

Is it possible to map that accelerator to an other less conflictive key
upstream?
I know how to fix that issue, but we are asking you to resolve it
globally.