Create Readouts controller

Move #readouts + #toggle_exposure from Measurements to Readouts

app/helpers/body_trackers_helper.rb

@@ -22,6 +22,10 @@ module BodyTrackersHelper
     t&.strftime("%R")
   end
 
+  def format_datetime(dt)
+    dt.strftime("%F <small>%R&emsp;(~#{time_ago_in_words(dt)} ago)</small>").html_safe
+  end
+
   def toggle_exposure_options(enabled, domain = :all)
     enabled = enabled.map { |q| [q.name, q.id] }
     enabled_ids = enabled.map(&:last)

app/helpers/measurements_helper.rb

@@ -1,10 +1,4 @@
 module MeasurementsHelper
-  def format_datetime(m)
-    m.taken_at
-      .strftime("%F <small>%R&emsp;(~#{time_ago_in_words(m.taken_at)} ago)</small>")
-      .html_safe
-  end
-
   def action_links(m)
     link_to(l(:button_retake), retake_measurement_path(m, @view_params),
             {remote: true, class: "icon icon-reload"}) +