remove horizontal space at the beginning of a measure

I often have long measures that I don't mind splitting over two systems. I prefer this over having abnormally stretched out measures to fill the system width. So, what I used to do in Finale is make two smaller measures out of a big measure and set the bar line to invisible. If the computer decides that the two smaller measures should be on one system, that's fine. But if it decides to break the two measures over two systems, that's fine, too. There is a little problem, though, because there is a default horizontal extra space added at the beginning of each measure. When the bar line is set to invisible, I end up with a gap between successive notes if the measures end up on one system. Is there a way to remove this default space at the beginning of a selected measure?

Alternatively, is there a way to tell Musescore to allow a measure to be broken over two systems in order to make the spacing of the score more uniform?