Add memes & meme-editing views

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

src/screens/addTag.tsx

@@ -14,7 +14,7 @@ import { Tag } from '../database';
 import { TagEditor } from '../components';
 
 const AddTag = () => {
-  const navigation = useNavigation();
+  const { goBack } = useNavigation();
   const { colors } = useTheme();
   const { orientation } = useDimensions();
   const realm = useRealm();
@@ -32,13 +32,13 @@ const AddTag = () => {
       });
     });
 
-    navigation.goBack();
+    goBack();
   };
 
   return (
     <>
       <Appbar.Header>
-        <Appbar.BackAction onPress={() => navigation.goBack()} />
+        <Appbar.BackAction onPress={() => goBack()} />
         <Appbar.Content title={'Add Tag'} />
       </Appbar.Header>
       <ScrollView