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Add a regression test that PO dribbles what it prints.

Add a test that commands run from GUI are written to DRIBBLE file

Remove trailing whitespace

Fix a build break when USE_RICHTEXT_CODE_EDITOR is defined.

Re-run mklocale.pl to regenerate the untranslated parts of localizedstrings-si.h.

Integrate a Slovene translation from Jelko Urbančič

Add more bad input tests for DRIBBLE

Move the tests for DRIBBLE into their own file.
This was done in anticipation of adding more test coverage for DRIBBLE.

Merge in changes from trunk (mostly new keyboard shortcuts)

Make PageUp and Shift+PageUp from commander input act as if the caret were at the bottom of the commander history.
This is part of Feature Request #121.