updated floater_test_textbox to test case of texbox too big for its text

removed picture_style from sidepanel_object_info.xml
made mime_type error notification unique on mime type

reviewed by Leyla

indra/newview/skins/default/xui/en/floater_test_textbox.xml

@@ -145,11 +145,11 @@
   <text
  type="string"
  length="1"
- bottom="390"
+ height="60" 
  label="N"
  layout="topleft"
  left="10"
- name="centered_text"
+ name="left_aligned_text"
  width="380"
  halign="left"
  text_color="1 1 1 0.7"

indra/newview/skins/default/xui/en/notifications.xml

@@ -4629,6 +4629,9 @@ If you want to view streaming media on parcels that support it you should go to
    name="NoPlugin"
    type="notify">
 No Media Plugin was found to handle the "[MIME_TYPE]" mime type.  Media of this type will be unavailable.
+  <unique>
+    <context key="MIME_TYPE" />
+  </unique>
   </notification>
   <notification
    icon="alertmodal.tga"