[WIP] Improve master layout for different devices + product growth

We have two pressing needs:

1. Improve experience on real estate challenged devices.
2. Make room for product feature-set growth.

To hit these targets, we need to develop better UX through smarter on-screen space management.

gui/app/pods/document/section/template.hbs

@@ -1,5 +1,5 @@
 {{#layout/master-sidebar}}
-	{{ui/ui-spacer size=300}}
+	<Ui::UiSpacer @size=300 />
 
 	<div class="section">
 		{{#link-to "document.index" model.folder.id model.folder.slug model.document.id model.document.slug}}
@@ -9,16 +9,16 @@
 {{/layout/master-sidebar}}
 
 {{#layout/master-content}}
-	{{document/document-editor 
-		document=model.document 
-		folder=model.folder 
-		page=model.page 
+	{{document/document-editor
+		document=model.document
+		folder=model.folder
+		page=model.page
 		meta=model.meta
 		attachments=model.attachments
 		onCancel=(action "onCancel") onAction=(action "onAction")}}
 
-	{{document/section-attachment uploadLabel="Upload Attachments" 
-		editMode=true page=model.page document=model.document 
+	{{document/section-attachment uploadLabel="Upload Attachments"
+		editMode=true page=model.page document=model.document
 		files=model.attachments
 		onAttachmentUpload=(action "onAttachmentUpload")
 		onAttachmentDelete=(action "onAttachmentDelete")}}