Add option to not use class colors and instead use a common color for all bars.

Localization/esES.lua

@@ -136,6 +136,10 @@ L["Use 'My Bar' color"] = true
 L["Use a different colored background for your threat bar in Omen"] = true
 L["'My Bar' BG Color"] = true
 L["The background color for your threat bar"] = true
+L["Use Class Colors"] = true
+L["Use standard class colors for the background color of threat bars"] = true
+L["Bar BG Color"] = true
+L["The background color for all threat bars"] = true
 L["Bar Label Options"] = "Opciones de Etiqueta de Barra"
 L["Font"] = "Fuente"
 L["The font that the labels will use"] = "El fuente que las etiquetas usarán"