[Frontend] IN-PROGRESS Theming continues

open #95
Shadow and color normalization: fixed-position, tabular;
Updated paint bucket and icon-box in symbols font;
Custom checkboxes now use inset shdw;

platform/commonUI/general/res/sass/overlay/_overlay.scss

@@ -25,6 +25,7 @@
 		z-index: 100;
 	}
     .clk-icon.close {
+        font-size: 0.8rem;
         position: absolute;
         top: $interiorMarginLg; right: $interiorMarginLg; bottom: auto; left: auto;
 	    z-index: 100;