Fix #4522: Sidebar doesn't show most searched tags at certain times of day.

Revert back to previous workaround of fetching previous day if current
day returns no result. A terrible hack, really we should convert dates
to Reportbooru's timezone, but that has other complications.

app/controllers/explore/posts_controller.rb

@@ -28,11 +28,11 @@ module Explore
 
     def searches
       @date, @scale, @min_date, @max_date = parse_date(params)
-      @search_service = ReportbooruService.new
+      @searches = ReportbooruService.new.popular_searches(@date)
     end
 
     def missed_searches
-      @search_service = ReportbooruService.new
+      @missed_searches = ReportbooruService.new.missed_search_rankings
     end
 
     private