Event dialogs don't disappear when moved out of view

[bestchai]

Click on an event node that opens a dialog. Then scroll horizontally (if there are so many processes that some are out of view), or vertically (if there are enough events). When the column for the selected event log goes off to the right, the nodes and edges disappear, but the dialog remains. When the dialog goes above the

Ideally, it would either hide or disappear when going out of the view area.

[Issue created by grahamstl: 2017-04-30]
[Last updated on bitbucket: 2017-05-02]

[Comment created by grahamstl: 2017-04-30]
Also, host dialogs don't disappear when scrolled horizontally out of view