[Frontend] CSS hooks for staleness

WTD-1172
New .scss file for staleness
Added CSS hooks in templates for staleness

platform/commonUI/general/res/sass/_data-status.scss

@@ -0,0 +1,5 @@
+.s-stale {
+	//color: $colorTelemStale !important;
+	opacity: 0.5 !important;
+	font-style: italic !important;
+}

platform/commonUI/general/res/sass/_main.scss

@@ -16,6 +16,7 @@
 @import "badges";
 @import "icons";
 @import "limits";
+@import "data-status";
 @import "lists/tabular";
 @import "controls/buttons";
 @import "controls/color-palette";