[Bug 1801782] Re: Main window maximizes width on the closing appplication.

[Gordon Lack]

FYI: As I shut-down Thunderbird teh .xsessions-erros file gets these
entries.

==========
1549728585353   addons.xpi      WARN    Exception running bootstrap method shutdown on menuOnTop at agrude.com: ReferenceError: windows is not defined (chrome://shimmenuontopecma/content/menuontop_shim.jsm:30:1) JS Stack trace: stopWindows at menuontop_shim.jsm:30:1
shutdown at resource://gre/modules/addons/XPIProvider.jsm -> jar:file:///local/users/gml4410/.thunderbird/448skcjj.default/extensions/menuOnTop@bootstrap.js:125:2
callBootstrapMethod at XPIProvider.jsm:4446:20
observe at XPIProvider.jsm:2293:13
goQuitApplication at globalOverlay.js:56:3
oncommand at messenger.xul:1:1
JavaScript error: chrome://messenger/content/mailWidgets.xml, line 2733: TypeError: this._parentMenupopup is null
qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 46190, resource id: 81788945, major code: 15 (QueryTree), minor code: 0
kdeinit5: PID 15566 terminated.
==========

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Title:
  Main window maximizes width on the closing appplication.

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