only load necessary packages (not all of statnet)
increase priority of ui containers for colorby menus, to ensure they are not null when called from other reactive objects
change aftersymm radio buttons to bsButtonGroup
simple fix to solve delay in clicking 'Add Term(s)' button
remove warnings for term delay in chrome,
remove unused css from chooser widget
reset formula and summary statistics when network is changed
revert to vertex size of 1, now that plots are bigger