basic multi-activity filtering
add labels to radio buttons
switch to Bootstrap 3 modal
clean up view
improve activity filter status display
improve modal layout
revise form layout
remove unused filter
switch to flat acts list for binding
add filter notification to form
add truncate filter
add reset button to activity filter
cleanup
change _No Activity to -1
add no activity to dictionaries
remove unnecessary scaffolding for no activity
cleanup and docs
remove unnecessary variable
improve docs
add gump filter for activities