fix #289765: Continuous view: Key change forces double barline

[Jojo-Schmitz]

No description provided.

[MarcSabatella]

The meaning of that parameter is to force a few special behaviors for the last measure in the system. One is indeed this: automatically adding the double bar before a courtesy key signature. Another is to suppress the end barline for a measure that is immediately followed (on the same system) by a start repeat. So, calling createEndBarLines with this set to false will mean we skip the barline before a start repeat, which is good since it's what we do in page view too. It's harmless but maybe it's causing the thick portion of the start repeat to be too thick by half a normal barline width?

Anyhow, my sense is this should be harmless, and if it helps the drawing of the start repeat, maybe even somewhat beneficial. But also not really necessary.