Related: tdf#72880 presumably using startcenter as generic LO target will work

for the gnome case

Change-Id: Icb5ad2d50d672b35783720c100a408fa3e5cb63e

sysui/desktop/menus/startcenter.desktop

@@ -23,7 +23,7 @@ Icon=startcenter
 Type=Application
 Categories=Office;X-Red-Hat-Base;X-SuSE-Core-Office;X-MandrivaLinux-Office-Other;
 Exec=${UNIXBASISROOTNAME} %%FILE%%
-MimeType=application/vnd.openofficeorg.extension;
+MimeType=application/vnd.openofficeorg.extension;x-scheme-handler/vnd.libreoffice.cmis;
 Name=%PRODUCTNAME
 GenericName=Office
 Comment=The office productivity suite compatible to the open and standardized ODF document format. Supported by The Document Foundation.