Show only known accounts/wallets/addresses on Home (#4612)

* Don't render unknown entries

* Only render non-null items

* Remove (now) invalid failing test

js/src/ui/SectionList/sectionList.js

@@ -46,10 +46,18 @@ export default class SectionList extends Component {
       return null;
     }
 
+    const rendered = items
+      .map(this.renderItem)
+      .filter((item) => item);
+
+    if (!rendered.length) {
+      return null;
+    }
+
     return (
       <section className={ [styles.section, className].join(' ') }>
         { this.renderOverlay() }
-        { chunkArray(items, ITEMS_PER_ROW).map(this.renderRow) }
+        { chunkArray(rendered, ITEMS_PER_ROW).map(this.renderRow) }
       </section>
     );
   }
@@ -74,11 +82,7 @@ export default class SectionList extends Component {
         className={ styles.row }
         key={ `row_${index}` }
       >
-        {
-          row
-            .map(this.renderItem)
-            .filter((item) => item)
-        }
+        { row }
       </div>
     );
   }

js/src/ui/SectionList/sectionList.spec.js

@@ -74,10 +74,6 @@ describe('SectionList', () => {
       it('adds a key for the row', () => {
         expect(row.key).to.be.ok;
       });
-
-      it('calls renderItem for the items', () => {
-        expect(instance.renderItem).to.have.been.calledTwice;
-      });
     });
 
     describe('renderItem', () => {

js/src/views/Home/Accounts/accounts.js

@@ -80,7 +80,12 @@ class Accounts extends Component {
       return null;
     }
 
-    const account = accountsInfo[history.entry] || { meta: {} };
+    const account = accountsInfo[history.entry];
+
+    if (!account) {
+      return null;
+    }
+
     let linkType = 'addresses';
 
     if (account.uuid) {