I guess (and this is really just a guess) that it's GTK+'s workaround against narrow handles, and if you have a wider handle then it no longer extends its click area beyond its visible bits.
Could you try the patch from bug 1522575 and then a giant separator size?
I guess (and this is really just a guess) that it's GTK+'s workaround against narrow handles, and if you have a wider handle then it no longer extends its click area beyond its visible bits.
Could you try the patch from bug 1522575 and then a giant separator size?