Unable to add Instrument Change text to first note of score

Ubuntu 14.04, GIT commit: f59e1af

1) new score
2) select first rest
3) double click Instrument inText palette

Result: nothing happens - no Instrument element is added to score

At one time, this worked, but caused problems - see #45231: Undo does not restore sound of deleted instrument change, crash on subsequent undo, #45076: Instrument change in first tick corrupts staff instrument, cannot be undone, and a couple of others. This was fixed recently by making the initial instrument in the map tick -1 instead of 0, so an instrument on the first note didn't interfere.

The recent commit https://github.com/musescore/MuseScore/commit/2dcd7b980f20183daeb7ecd5c… undoes some of this, and I assume that has to do with why you cannot currently add the isntrument change on the first note at all.