Problem when double-clicking to auto-size column in query window

[Jack Royal-Gordon]

When I double-click on the column border of the query result window to 
auto-size a column, I get no resizing and the following error in the log. I get 
this both with Safari and Chrome. I’m running version 4.1of pgAdmin4.

Error from Safari:
TypeError: undefined is not an object (evaluating 'b().fromCell’)
        n  sqleditor.js:619264
        (anonymous function) vendor.js: 789612
        trigger  vendor.js: 2206214
        handleHeaderCheck  vendor.js: 2230971
        dispatch  vendor.js: 51259
        (anonymous function)  vendor.js: 1947375

Error  from Chrome:
Uncaught TypeError: Cannot read property 'fromCell' of undefined
    at SlickGrid.n (sqleditor.js?ver=40100:1)
    at i.notify (vendor.js?ver=40100:1)
    at trigger (vendor.js?ver=40100:1)
    at HTMLDivElement.handleHeaderClick (vendor.js?ver=40100:1)
    at HTMLDivElement.dispatch (vendor.js?ver=40100:1)
    at HTMLDivElement.i.dispatch (vendor.js?ver=40100:1)
    at HTMLDivElement.g.handle (vendor.js?ver=40100:1)