Dropdown disappears on workitem refresh in Microsoft Edge

[maxxwizard]

Repro steps:

1. Create a bug.
2. Switch to History tab and click the refresh icon.
3. Switch back to Details tab and notice the multivalue control is not rendering properly. You can hover over it to see the help tool tip but cannot edit the dropdown.

Issue only reproduces in Edge, not Chrome.

Edge Microsoft Edge 42.17134.1.0 Microsoft EdgeHTML 17.17134

Chrome Version 70.0.3538.102 (Official Build) (64-bit)

[mmanela]

@maxxwizard Can you share a screenshot? @ostreifel can you take a look

[maxxwizard]

before

after

[aDavidaIsNoOne]

Can also confirm the bug in Firefox 64.0b9 (64-bit).

I noticed there's no listener for the the onRefreshed event. Technically this should be occurring in Chrome as well, which implies inconsistent event behavior across browsers.

    return {
        onLoaded: (args: WitExtensionContracts.IWorkItemLoadedArgs) => {
            ensureControl();
        },
        onFieldChanged: (args: WitExtensionContracts.IWorkItemFieldChangedArgs) => {
            if (control && args.changedFields[control.fieldName] !== undefined &&
                args.changedFields[control.fieldName] !== null
            ) {
                control.refresh();
            }
        },
};

[aDavidaIsNoOne]

I was incorrect in my assumption, it actually turned out to be the resize method. FF and Edge were reporting a scrollWidth and scrollHeight of 0 when refreshing from another tab.

private _resize = () => {
        VSS.resize(this._container.scrollWidth || 200, this._container.scrollHeight || 40);
}