Comment 10 for bug 1647292

OK, So you can take a look at branch: https://code.launchpad.net/~stephen-j-boddy/terminator/gtk3-fix-transparency
Which has work related to https://bugs.launchpad.net/terminator/+bug/1599453
It also has a fix for this issue. I accidentally made the behaviour tied in with the setting of the separator size. So if size is -1 (default to theme value) you get the existing Adwaita behaviour with the extended hover area. Set it to 0+ and the extended hover area is removed. I actually meant to remove it full stop, but perhaps this is a lucky fluke? Would anyone ever want the extra grabbable area?