Revert "FIRE-15879 - grid picker URI entry on legacy login"

This reverts commit 3b980889c9.

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

@@ -187,20 +187,17 @@
         Log into Grid:
       </text>
       <combo_box
-        allow_text_entry="true"
-        follows="left|bottom"
-        height="22"
-        max_chars="256"
-        force_disable_fulltext_search="true"
-        combo_editor.commit_on_focus_lost="false"
-        combo_editor.prevalidate_callback="ascii"
-        tool_tip="An existing grid or a grid URI"
-        name="server_combo"
-        width="135"
-        combo_button.scale_image="true" >    
-      <combo_box.drop_down_button
-        font="SansSerifLarge"/>
-      </combo_box>
+          allow_text_entry="false"
+          font="SansSerifSmall"
+          follows="left|right|bottom"
+          height="23"
+          max_chars="256"
+          left="10"
+          top="51"
+          layout="topleft"
+          top_pad="2"
+          name="server_combo"
+          width="135" />
     </layout_panel>
     <layout_panel
         auto_resize="false"