Word Documents; improved ISSummaryTable border helper functions

The Word Document Summary Table border helper method SetBordersCell did not work correctly - the border Style was never set.

Therefore a new method ISSummaryTableWordDocumentOptions.SetBordersCells has been added.

Its parameters include:

• Border As iseWordDocumentSummaryTableBorder
• Colour As String
• LineWidth As Double, optional, default=1
• Style As iseWordDocumentSummaryTableBorderStyle, optional, default=iseWordDocumentSummaryTableBorderStyle.Single
• InteriorBordersOnly As Boolean, optional, default=False
• SkipCellsWithBorders As Boolean, optional, default=True

In particular Style and InteriorBordersOnly have been added. Style set the line style and InteriorBordersOnly determines whether the outside table border is overwritten.