fix focus on new editorState as it didn't have focus so broke when alt tab

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/components/views/rooms/MessageComposerInput.js

@@ -330,8 +330,9 @@ export default class MessageComposerInput extends React.Component {
             }
             return editorState;
         } else {
-            // ...or create a new one.
-            return Plain.deserialize('', { defaultBlock: DEFAULT_NODE });
+            // ...or create a new one. and explicitly focus it otherwise tab in-out issues
+            const base = Plain.deserialize('', { defaultBlock: DEFAULT_NODE });
+            return base.change().focus().value;
         }
     }