Add a class to tiddler frames in view mode

We’re already marking tiddlers in edit mode with tw-tiddler-edit-mode,
makes sense to make view mode tiddlers too.

core/ui/ViewTemplate.tid

@@ -1,7 +1,7 @@
 title: $:/core/ui/ViewTemplate
 
 \define frame-classes()
-tw-tiddler-frame $(missingTiddlerClass)$ $(shadowTiddlerClass)$ $(systemTiddlerClass)$
+tw-tiddler-frame tw-tiddler-view-frame $(missingTiddlerClass)$ $(shadowTiddlerClass)$ $(systemTiddlerClass)$
 \end
 <$set name="storyTiddler" value=<<currentTiddler>>><$set name="tiddlerInfoState" value=<<qualify "$:/state/tiddlerInfo">>><$tiddler tiddler=<<currentTiddler>>><div class=<<frame-classes>>><$list filter="[is[shadow]!has[draft.of]tag[$:/tags/ViewTemplate]] [!is[shadow]!has[draft.of]tag[$:/tags/ViewTemplate]] +[tag[$:/tags/ViewTemplate]]" variable="listItem"><$transclude tiddler=<<listItem>>/></$list>
 </div>