DEV-52553 FIX Font color/opacity issue in Group Panels

DEV-52554 FIX Font color/opacity issue in About Second Life floater
DEV-52617 FIX Font color/opacity issue in Profile Panel
DEV-52618 FIX Font color/opacity issue in Covenant tab of About Land
reviewed by Monroe

indra/newview/skins/default/xui/en/widgets/text_editor.xml

@@ -2,5 +2,4 @@
 <!-- Core parameters are in simple_text_editor.xml -->
 <text_editor
   parse_urls="false"
-  text_readonly_color="LabelDisabledColor"
   show_context_menu="true"/>