[Fronted] Significant refactoring of mixins for containers and buttons

WTD-839
Refactoring in advance of style mods to switcher when in frame;
Cleanup of markup to remove 'icon' class from invoke-menu elements;

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

@@ -42,12 +42,6 @@
         &.major {
             font-size: 1.65em;
         }
-        &:hover {
-            //			color: lighten($c, $ltGamma);
-            .invoke-menu {
-                //				color: lighten($colorBodyBg, $ltGamma * 2);
-            }
-        }
     }
 }
 
@@ -56,28 +50,21 @@
 }
 
 .invoke-menu {
-    @include invokeMenu($colorKey);
+    //@include invokeMenu(); // $colorKey
+	text-shadow: none;
     display: inline-block;
-    font-size: 1rem;
+    font-size: 0.8rem;
     vertical-align: middle;
 }
 
 .btn-menu .invoke-menu,
 .icon.major .invoke-menu {
-    margin-left: $interiorMargin;
-}
-
-.icon-buttons-main .invoke-menu {
-    @include invokeMenu(lighten($colorBodyBg, $ltGamma));
-}
-
-.menu-element .invoke-menu {
-
+    margin-left: $interiorMarginSm;
 }
 
 .object-header .type-icon {
     color: $colorKey;
-	margin-right: $interiorMargin;
+	margin-right: $interiorMarginSm;
 }
 
 .menu .type-icon,