Branches view: ahead/behind commits should not include merge commits (pre-19.1 counting)

Since version 19.1 the way of the ahead/behind commit counting has been changed (it counts both current branch and merge branch commits). It makes us confuse about: how many commits had been reset on a branch or how many ahead commits of the current branch. So I think best would be to have an option/setting to switch back to pre-19.1 counting.