fixed import errors
don't import SysLogger if not needed. prevents unnecessary warning on startup
experiment fixes.
fixed initializationparser to use str_to_bool instead of get("enabled")=='true'
fixed display of isotopes in plotpanel.
save analysis with tag='ok'
use _monitor_factory instead of monitor_default for experiment executor

fixed main_view update_ratios- use nominal_value(ic)
fixed browser persistence if no project/sample selected.
handle zero division when calculating decay factor
added setup_ver to build_version. use to change with Pychrondata is used
updated app maker. copy splash/about as splash.png instead of splash_experiment.png.
cleanup todo's
fixed truncate analyses with counts. user can now increase the number of counts
fixed rapid add/paste?
added "cut"
added combo slicing for positions. e.g 1-5;9;20;50-42.  added positions unittest
fixed auto increment for position rules
fixed recall from query pane