[PUSHED][REVIEW 3-5] resolved fdo#49639 import .xls with HTML as such, not CSV

[Caolán McNamara]

On Thu, 2012-05-10 at 19:13 +0200, Eike Rathke wrote:
> Hi,
> 
> Please review attached patch and commit to 3-5. Fixes
> https://bugs.freedesktop.org/show_bug.cgi?id=49639
> FILEOPEN html content .xls files shows text.csv with html tags instead
> of Spreadsheet contents

cherry-picked to 3-5

C.