handle different means to set rootfilename more correctly
added button to change rootfile name
add buttons to save configuration files
change to low-range as default
add button to change base output directory
added helper functions to get back vector with all selected ROCs and TBMs
collect useful functions in one place (class because it works without tweaking cmake lists)
move rootfile when output directory is changed
Merge branch 'master' of github.com:psi46/pxar