fdo#37606 SwEditShell::DeleteSel(): handle document starting with a table
fdo#37606 SwEditShell::DeleteSel(): handle document starting with a table

If the whole document is selected and the document starts with a table,
then we used to delete the contents of the document, except the starting
table, which was just cleared. Change this and do what is expected:
remove the table as well, so the document will have a single empty
paragraph only.

Change-Id: I47d3fab462e2a4149f6459d61e487fee8c5c30ed

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core