Temporarily limit locations when creating sessions

There are 51k+ locations in the database after running the GIAS import.
We can't display all of them at the same time, and instead should use
something like an autocomplete that fetches locations from the server.

Author: tvararu

app/controllers/sessions/edit_controller.rb

@@ -95,7 +95,8 @@ def set_steps
   end
 
   def set_locations
-    @locations = policy_scope(Location).order(:name)
+    # TODO: Use an autocomplete instead.
+    @locations = policy_scope(Location).order(:name).limit(100)
   end
 
   def set_patients