Linked Series (#1230)

* Implemented the ability to link different series together through Edit Series. CSS pending.

* Fixed up the css for related cards to show the relation

* Working on making all tabs in edit seris modal save in one go. Taking a break.

* Some fixes for Robbie to help with styling on

* Linked series pill, center library

* Centering library detail and related pill spacing

- Library detail cards are now centered if total number of items is > 6 or if mobile.
- Added ability to determine if mobile (viewport width <= 480px
- Fixed related card spacing
- Fixed related card pill spacing

* Updating relation form spacing

* Fixed a bug in card detail layout when there is no pagination, we create one in a way that all items render at once.

* Only auto-close side nav on phones, not tablets

* Fixed a bug where we had flipped state on sideNavCollapsed$

* Cleaned up some misleading comments

* Implemented RBS back in and now  if you have a relationship besides prequel/sequel, the target series will show a link back to it's parent.

* Added Parentto pipe

* Missed a relationship type

Co-authored-by: Robbie Davis <robbie@therobbiedavis.com>

API/Data/DataContext.cs

@@ -41,24 +41,36 @@ namespace API.Data
         public DbSet<Genre> Genre { get; set; }
         public DbSet<Tag> Tag { get; set; }
         public DbSet<SiteTheme> SiteTheme { get; set; }
+        public DbSet<SeriesRelation> SeriesRelation { get; set; }
 
 
-        protected override void OnModelCreating(ModelBuilder builder)
+        protected override void OnModelCreating(ModelBuilder modelBuilder)
         {
-            base.OnModelCreating(builder);
+            base.OnModelCreating(modelBuilder);
 
 
-            builder.Entity<AppUser>()
+            modelBuilder.Entity<AppUser>()
                 .HasMany(ur => ur.UserRoles)
                 .WithOne(u => u.User)
                 .HasForeignKey(ur => ur.UserId)
                 .IsRequired();
 
-            builder.Entity<AppRole>()
+            modelBuilder.Entity<AppRole>()
                 .HasMany(ur => ur.UserRoles)
                 .WithOne(u => u.Role)
                 .HasForeignKey(ur => ur.RoleId)
                 .IsRequired();
+
+            modelBuilder.Entity<SeriesRelation>()
+                .HasOne(pt => pt.Series)
+                .WithMany(p => p.Relations)
+                .HasForeignKey(pt => pt.SeriesId)
+                .OnDelete(DeleteBehavior.ClientCascade);
+
+            modelBuilder.Entity<SeriesRelation>()
+                .HasOne(pt => pt.TargetSeries)
+                .WithMany(t => t.RelationOf)
+                .HasForeignKey(pt => pt.TargetSeriesId);
         }