Write KeyboardShortcuts more naturally.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Remove unused code.

The only case in which we can call toggle_state from outside of the
class it's declared in is in DisplayTemplateRecordView.  However, we no
longer try to toggle the first cell, which is the only one that can
contain a non-checkbox.  Remove this code since it is never used.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>