Fix collection template issues introduced in #205

This fixes a template rendering issue caused by bad references to $.Host
in pinned posts links on single-user instances.

Closes #207

templates/chorus-collection-post.tmpl

@@ -80,7 +80,7 @@ article time.dt-published {
 			</p>
 			<nav>
 				{{if .PinnedPosts}}
-				{{range .PinnedPosts}}<a class="pinned{{if eq .Slug.String $.Slug.String}} selected{{end}}" href="{{if not $.SingleUser}}/{{$.Collection.Alias}}/{{.Slug.String}}{{else}}{{.CanonicalURL .Host}}{{end}}">{{.PlainDisplayTitle}}</a>{{end}}
+				{{range .PinnedPosts}}<a class="pinned{{if eq .Slug.String $.Slug.String}} selected{{end}}" href="{{if not $.SingleUser}}/{{$.Collection.Alias}}/{{.Slug.String}}{{else}}{{.CanonicalURL $.Host}}{{end}}">{{.PlainDisplayTitle}}</a>{{end}}
 				{{end}}
 			</nav>
 			<hr>

templates/chorus-collection.tmpl

@@ -71,7 +71,7 @@ body#collection header nav.tabs a:first-child {
 			<!--p class="meta-note"><span>Private collection</span>. Only you can see this page.</p-->
 		{{/*end*/}}
 		{{if .PinnedPosts}}<nav class="pinned-posts">
-			{{range .PinnedPosts}}<a class="pinned" href="{{if not $.SingleUser}}/{{$.Alias}}/{{.Slug.String}}{{else}}{{.CanonicalURL .Host}}{{end}}">{{.PlainDisplayTitle}}</a>{{end}}</nav>
+			{{range .PinnedPosts}}<a class="pinned" href="{{if not $.SingleUser}}/{{$.Alias}}/{{.Slug.String}}{{else}}{{.CanonicalURL $.Host}}{{end}}">{{.PlainDisplayTitle}}</a>{{end}}</nav>
 		{{end}}
 		</header>
 		

templates/collection-post.tmpl

@@ -50,7 +50,7 @@
 		<h1 dir="{{.Direction}}" id="blog-title"><a rel="author" href="{{if .IsTopLevel}}/{{else}}/{{.Collection.Alias}}/{{end}}" class="h-card p-author">{{.Collection.DisplayTitle}}</a></h1>
 			<nav>
 				{{if .PinnedPosts}}
-				{{range .PinnedPosts}}<a class="pinned{{if eq .Slug.String $.Slug.String}} selected{{end}}" href="{{if not $.SingleUser}}/{{$.Collection.Alias}}/{{.Slug.String}}{{else}}{{.CanonicalURL .Host}}{{end}}">{{.PlainDisplayTitle}}</a>{{end}}
+				{{range .PinnedPosts}}<a class="pinned{{if eq .Slug.String $.Slug.String}} selected{{end}}" href="{{if not $.SingleUser}}/{{$.Collection.Alias}}/{{.Slug.String}}{{else}}{{.CanonicalURL $.Host}}{{end}}">{{.PlainDisplayTitle}}</a>{{end}}
 				{{end}}
 				{{ if and .IsOwner .IsFound }}<span class="views" dir="ltr"><strong>{{largeNumFmt .Views}}</strong> {{pluralize "view" "views" .Views}}</span>
 				<a class="xtra-feature" href="/{{if not .SingleUser}}{{.Collection.Alias}}/{{end}}{{.Slug.String}}/edit" dir="{{.Direction}}">Edit</a>

templates/collection-tags.tmpl

@@ -48,7 +48,7 @@
 		<h1 dir="{{.Direction}}" id="blog-title"><a href="{{if .IsTopLevel}}/{{else}}/{{.Collection.Alias}}/{{end}}" class="h-card p-author">{{.Collection.DisplayTitle}}</a></h1>
 			<nav>
 				{{if .PinnedPosts}}
-				{{range .PinnedPosts}}<a class="pinned" href="{{if not $.SingleUser}}/{{$.Collection.Alias}}/{{.Slug.String}}{{else}}{{.CanonicalURL .Host}}{{end}}">{{.DisplayTitle}}</a>{{end}}
+				{{range .PinnedPosts}}<a class="pinned" href="{{if not $.SingleUser}}/{{$.Collection.Alias}}/{{.Slug.String}}{{else}}{{.CanonicalURL $.Host}}{{end}}">{{.DisplayTitle}}</a>{{end}}
 				{{end}}
 			</nav>
 		</header>

templates/collection.tmpl

@@ -71,7 +71,7 @@
 			<!--p class="meta-note"><span>Private collection</span>. Only you can see this page.</p-->
 		{{/*end*/}}
 		{{if .PinnedPosts}}<nav>
-			{{range .PinnedPosts}}<a class="pinned" href="{{if not $.SingleUser}}/{{$.Alias}}/{{.Slug.String}}{{else}}{{.CanonicalURL .Host}}{{end}}">{{.PlainDisplayTitle}}</a>{{end}}</nav>
+			{{range .PinnedPosts}}<a class="pinned" href="{{if not $.SingleUser}}/{{$.Alias}}/{{.Slug.String}}{{else}}{{.CanonicalURL $.Host}}{{end}}">{{.PlainDisplayTitle}}</a>{{end}}</nav>
 		{{end}}
 		</header>