Only show items in the library that would have image steps for offline

Because the video steps get replaced by an image step if offline, we should not show items that would result in having no content

src/containers/tips-library.jsx

@@ -62,10 +62,16 @@ class TipsLibrary extends React.PureComponent {
     }
     render () {
         const decksLibraryThumbnailData = Object.keys(decksLibraryContent)
-            .filter(id =>
+            .filter(id => {
+                if (notScratchDesktop()) return true; // Do not filter anything in online editor
+                const deck = decksLibraryContent[id];
                 // Scratch Desktop doesn't want tutorials with `requiredProjectId`
-                notScratchDesktop() || !decksLibraryContent[id].hasOwnProperty('requiredProjectId')
-            )
+                if (deck.hasOwnProperty('requiredProjectId')) return false;
+                // Scratch Desktop should not load tutorials that are _only_ videos
+                if (deck.steps.filter(s => s.title).length === 0) return false;
+                // Allow any other tutorials
+                return true;
+            })
             .map(id => ({
                 rawURL: decksLibraryContent[id].img,
                 id: id,