...when merely toggling the edit mode of a Calc document embedded in another
document (via "Insert - Object - OLE Object... - LibreOffice 5.4 Spreadsheet").

Interestingly, none of the other document kinds seem to have this problem.
(Maybe it's even unhelpful that ScTabViewShell::InnerResizePixel calls
SetDocumentModified() at all?)  Anyway, pass this inplaceEditModeChange
information down there.

Change-Id: Iffb24b068419e3608c9f4b5e9645e44e1716aafe