filler rework (#449)

* add chapter statistics and new filler options

* refactor playout builder

* more refactor prep for filler

* rewrite schedulers

* refactor collectionkey

* add tail filler kind

* migrate tail filler to filler preset

* optionally show filler

* fix playout detail row count

* remove duration tail filler options

* implement tail and fallback in flood scheduler

* implement tail and fallback in one scheduler

* implement tail and fallback in multiple scheduler

* implement looping fallback filler

* more duration tests

* start to add post-roll filler to flood

* rework playoutitem filler tagging

* rework scheduler logging

* calculate whether configured filler will fit

* implement pre-roll and post-roll duration and count filler

* improve duration filler calculation

* add minutes to search index

* update channel guide to work with new filler

* add mid-roll filler

* don't clone enumerators for filler calculations

* support pre-roll and post-roll pad filler

* implement mid-roll pad filler

* allow clearing filler selections in schedule editor

* fix tests

* filler config validation

* use consistent time zone for tests

ErsatzTV.Application/ProgramSchedules/ProgramScheduleItemMultipleViewModel.cs

@@ -1,4 +1,5 @@
 using System;
+using ErsatzTV.Application.Filler;
 using ErsatzTV.Application.MediaCollections;
 using ErsatzTV.Application.MediaItems;
 using ErsatzTV.Core.Domain;
@@ -20,7 +21,12 @@ namespace ErsatzTV.Application.ProgramSchedules
             PlaybackOrder playbackOrder,
             int count,
             string customTitle,
-            GuideMode guideMode) : base(
+            GuideMode guideMode,
+            FillerPresetViewModel preRollFiller,
+            FillerPresetViewModel midRollFiller,
+            FillerPresetViewModel postRollFiller,
+            FillerPresetViewModel tailFiller,
+            FillerPresetViewModel fallbackFiller) : base(
             id,
             index,
             startType,
@@ -33,7 +39,12 @@ namespace ErsatzTV.Application.ProgramSchedules
             mediaItem,
             playbackOrder,
             customTitle,
-            guideMode) =>
+            guideMode,
+            preRollFiller,
+            midRollFiller,
+            postRollFiller,
+            tailFiller,
+            fallbackFiller) =>
             Count = count;
 
         public int Count { get; }