GRC: show categories from XML tree files in search
channels: Added option to block tags from propagating
digital: Fixed bug where OFDM Tx hier block would ignore 2nd sync word
digital: Rewrite of ?x_ofdm.grc examples to allow all configs with minimal user interaction, make clearer
Merge remote-tracking branch 'skoslowski/search_block_tree'
Merge remote-tracking branch 'martin/chantagdelete'
Merge remote-tracking branch 'martin/ofdm-fixes'