[Feature Request] Support for LibreOffice Calc

[athyfr]

Since support for tables has already been added, and I've made a suggestion for support for other LibreOffice apps, I thought this might be appropriate to suggest.

Although I don't really find myself using Calc, I imagine that this might be useful for others.

I suggest for localwriter to have support for LibreOffice Calc, as this may help improve the consistency between different LibreOffice apps when using this extension.