Fixes for !USE_SPARKLE on OS X.
Catch exceptions when failed to run gettext tools.
OS X: implement native Open Recent menu.

This code is one big gross ugly hack, but well, it works.

The trouble is that Cocoa does this using a bit of a black magic and
does it immediately after creating the app.  The magic involves finding
the specially-marked Open Recent menu at startup and using it.
Unfortunately, wx apps change the menu quite often (due to it being
per-window, not global), so we have to keep track of this special menu
and reparent it into the currently active menu bar.
Don't use the word "automatically" in Spanish & Italian translations.

The word "automatically" in any form is prone to being misinterpreted,
unfortunately, so it is better to avoid it altogether.
Update Russian translation.