Thanks to mst and rene for pointing out.

Started creating the menu list for the start center

Beginning of code for Start Center menu list

finished creating menu, issue getting it to display when program run

refractored package name to org.libreoffice.experimental

added the java files with renamed package

added new experimental dir and updated packages with appropriate name

The start and end points of the vertical and adjacent horizontal borders
were apart by 1.5 to 3 twips, leading to small visible gaps in the corners.
This is fixed by using lcl_AlignWidth/lcl_AlignHeight on the border widths,
and by always computing the start/end positions from the outer edge,
which makes the horizontal and vertical start/end points match.
(regression from 0f0896c2)

Thanks to Kohei for the test document

Please only change this file with Excel and check after changing it that
it still contains shared formulas in all places.

i.e. if more than one document open and dialog invoked on any but the first
document.