Fix crash when loading a file from abicommand. Please backport


git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/trunk@34036 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
Don't crash when exporting to .odt without a frame. Please backport.


git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/trunk@34041 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
Fix all warnings of builtin aiksaurus-gtk3 library and don't use it whaen available from aiksaurus itself. Please backport.


git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/trunk@34043 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
Added .docx as a default plugin.

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/trunk@34065 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6