With WS explorer closed, closing the editor results in the session moving up one line each time

Close the WS Explorer Type foo into the session Now hit ED EP repeatedly. Each time you hit EP the session moves down one line. Does not happen if WS Explorer is open (but then see #86 Closing the editor results in the WS explorer pane getting wider each time)

IDE: Version: 4.0.2644 Platform: Win32 Date: 2017-02-16 10:37:54 +0000 Git commit: 167f1aa6f75189bf7f9e19c1ff888f3d1dc02782 Preferences:{ "favs":"[{\"type\":\"connect\",\"ssh_auth_type\":\"pass\",\"ssh_tnl_auth_type\":\"pass\",\"name\":\"debian7dev\",\"host\":\"debian7dev.dyalog.bramley\",\"port\":\"4502\"},{\"type\":\"connect\",\"ssh_auth_type\":\"pass\",\"ssh_tnl_auth_type\":\"pass\",\"name\":\"dfsaix\",\"host\":\"10.0.61.100\",\"port\":\"9003\"},{\"ssh_auth_type\":\"pass\",\"ssh_tnl_auth_type\":\"pass\",\"type\":\"start\",\"exe\":\"C:\\Program Files\\Dyalog\\Dyalog APL-64 16.0 Unicode\\dyalog.exe\"},{\"ssh_auth_type\":\"pass\",\"ssh_tnl_auth_type\":\"pass\",\"name\":\"mac0\",\"host\":\"mac0\"},{\"ssh_auth_type\":\"pass\",\"ssh_tnl_auth_type\":\"pass\",\"name\":\"local\",\"host\":\"127.0.0.1\",\"port\":\"9999\",\"type\":\"start\",\"exe\":\"C:\\Program Files\\Dyalog\\Dyalog APL-64 16.0 Unicode\\dyalog.exe\"},{\"ssh_auth_type\":\"pass\",\"ssh_tnl_auth_type\":\"pass\",\"name\":\"p7-61qa\",\"host\":\"p7-61qa\",\"port\":\"4503\"}]", "kbdLocale":"en_GB", "selectedExe":"C:\Program Files\Dyalog\Dyalog APL-64 16.0 Unicode\dyalog.exe", "lineNums":"0" }

Interpreter: Version: 16.0.29184 Platform: Windows-64 Edition: Unicode/64 Date: Feb 14 2017 at 18:10:45

Dyalog / ride

With WS explorer closed, closing the editor results in the session moving up one line each time #88