Make preview smaller

Signed-off-by: Mario Danic <mario@lovelyhq.com>

app/src/main/res/values/dimens.xml

@@ -16,5 +16,5 @@
     <dimen name="chat_text_size">14sp</dimen>
     <dimen name="message_bubble_corners_radius">6dp</dimen>
     <dimen name="message_bubble_corners_padding">8dp</dimen>
-    <dimen name="large_preview_dimension">120dp</dimen>
+    <dimen name="large_preview_dimension">80dp</dimen>
 </resources>