STORM-1992 'Open voice connection' and 'Expand participant list' buttons are...

STORM-1992 'Open voice connection' and 'Expand participant list' buttons are overlapping each other in IM conversation after resizing.

doc/contributions.txt

@@ -674,6 +674,7 @@ Jonathan Yap
 	OPEN-161
 	STORM-1953
 	STORM-1957
+	STORM-1992
 Kadah Coba
 	STORM-1060
     STORM-1843

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

@@ -210,7 +210,7 @@
                      default_tab_group="3"
                      tab_group="2"
                      name="right_part_holder"
-                     min_width="172">
+                     min_width="230">
                         <layout_stack
                          animate="true" 
                          default_tab_group="2"