grc: yet another py26 incompatibility
grc: fix search entry box for old PyGTK versions
grc: update all flowgraphs when hiding port labels
grc: no icon in search entry box for old PyGTK versions
grc: move convert hier into a child generator
grc: refactor/enhance hier block generation
grc: fix lagging drag and drop
grc: fix missing xterm (Bug #725)
Merge branch 'maint_grcwg' into qtport
Merge branch 'generator_cleanup' into qtport