I have it now displaying all the Master techs, but there is a snag.
Because there is no filtering by faction abilities, stat icons from all the abilities show on each tech giving the impression that you will get all the 'unlocks' if you research it.
In game the Terrans Colonization tech gives you,
Computer Core, Deep Core Mine, Central Bank, Star Port, Space Elevator, Data Centre and Colony Module. 7 items.
With no filtering the tree viewer says Colonization Tech gives you all the above plus,
Planetary Mainframe, Planetary Extractor, Work Camp and Research Chamber. 11 items.
Do you still want to be able to see the whole tree as this may be misleading?