Support for merged cells and hyperlinks in Excel template

[dungsaga]

Hyperlinks in Excel template are recorded in element. This PR adds support for keeping updated correctly when rows/cells are added as a result of the calls to MergeBlock.

Merged cells in Excel template are records in element. This PR adds similar support for element.

This kind of support only works for merged cells and hyperlinks that are not in the same row as the row that has block=tbs:row (and similarly, not in the same column as the column that hasblock=tbs:cell).

A new ope was introduced to support this case, that's ope=mergecells.

Example:

• in a row that has block=tbs:row, a cell with ope=mergecells;cols=2 would generate a merged cell (containing 2 columns) in each added row
• in a row that has block=tbs:cell, a cell with ope=mergecells;rows=3 would generate a merged cell (containing 3 rows) in each added column

Parameters rows and cols can be omitted. The default value is the value of the current field. This feature allows the dimensions of the merged cell to be determined dynamically.

Example:

• in a row that has block=tbs:row, a cell with [block1.field2;ope=mergecells;rows=1] and block1.field2 has value 4 would generate a merged cell (containing 4 columns) in each added row
• in a row that has block=tbs:cell, a cell with [block1.field2;ope=mergecells;cols=1] and block1.field2 has value 5 would generate a merged cell (containing 5 rows) in each added column

[diantonio85]

Hi, will this ever get merged?