Done normal task EXT-6248 (3 different viewer 2 speakers lists are all inconsistent)

Turned on "show info button" for lists in group & ad-hoc chats.

Reviewed by Vadim Savchuk at https://codereview.productengine.com/secondlife/r/336/

--HG--
branch : product-engine

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

@@ -37,7 +37,7 @@
              layout="topleft"
              name="speakers_list"
              opaque="false"
-             show_info_btn="false"
+             show_info_btn="true"
              show_profile_btn="false"
              show_speaking_indicator="false"
              width="147" />

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

@@ -36,7 +36,7 @@
              layout="topleft"
              name="speakers_list"
              opaque="false"
-             show_info_btn="false"
+             show_info_btn="true"
              show_profile_btn="false"
              show_speaking_indicator="false"
              width="145" />