A helper to merge two nested lists describing extra page blocks. The lists have the page name on the first level and flattened documentation blocks on the second level. It is ensured that elements for the same page are grouped in the same list.
appendExtraPageBlocks(blocks, add)a nested list for extra page blocks per page
a seccond nested list for extra page blocks per page to be appended to the first one
Falk Benke