-change param dialog to panel within main window
-command line option for additional block wrappers
-log slider gui control
--icons for certain blocks, + for add
-zoom in/out (cairo vector graphics) (use scroll wheel as control)
-search for blocks
-click and drag on whitespace to scroll
-auto generate hier library
-auto clean hier library
-add hier blocks to tree without restart?
--dont hide vlen controller when vlen > 1
-dont generate py files in .grc file dir
-save/restore cwd
-special connection validation rules for disabled blocks