Server Module: box for str filter condition
module_server_lowercontrol_btn(
input,
output,
session,
selector_inputs,
action_track
)standard shiny boilerplate
reactive vals from above-plot controls, used to determine if plot is a map (lon/lat)
reactive, logical - has plot been pressed?
reactive values with input xvar, yvar and actionbutton counter
provides UI buttons for deleting last / entire outlier selection