Show PDF button in toolbar if file tree is closed in PDF flat view

services/web/app/views/project/editor/file-tree.jade

@@ -46,14 +46,15 @@ aside#file-tree(ng-controller="FileTreeController").full-size
 		ng-class="{ 'no-toolbar': !permissions.write }"
 	)
 
-		div(ng-show="ui.pdfLayout == 'flat' && (ui.view == 'editor' || ui.view == 'pdf')")
+		div(ng-show="ui.pdfLayout == 'flat' && (ui.view == 'editor' || ui.view == 'pdf' || ui.view == 'file')")
 			ul.list-unstyled.file-tree-list
 				li(
 					ng-class="{ 'selected': ui.view == 'pdf' }"
+					ng-controller="PdfViewToggleController"
 				)
 					.entity
 						.entity-name(
-							ng-click="ui.view = 'pdf'"
+							ng-click="togglePdfView()"
 						)
 							i.fa.fa-fw.toggle
 							i.fa.fa-fw.fa-file-pdf-o

services/web/app/views/project/editor/header.jade

@@ -14,6 +14,17 @@ header.toolbar.toolbar-header(ng-cloak, ng-hide="state.loading")
 		tooltip-append-to-body="true"
 	)
 		i.fa.fa-fw.fa-level-up
+	span(ng-controller="PdfViewToggleController")
+		a(
+			href,
+			ng-show="ui.pdfLayout == 'flat' && fileTreeClosed",
+			tooltip="PDF",
+			tooltip-placement="bottom",
+			tooltip-append-to-body="true",
+			ng-click="togglePdfView()",
+			ng-class="{ 'active': ui.view == 'pdf' }"
+		)
+			i.fa.fa-file-pdf-o
 
 	.toolbar-center.project-name(ng-controller="ProjectNameController")
 		span.name(