Change navigation structure

Change-Id: I12c819293ce1eda188dc9f257ae9370f1b73cb18
Signed-off-by: Iftekharul Islam <iislam@us.ibm.com>
diff --git a/app/common/styles/base/mixins.scss b/app/common/styles/base/mixins.scss
index 3313a88..acc8fd4 100644
--- a/app/common/styles/base/mixins.scss
+++ b/app/common/styles/base/mixins.scss
@@ -57,18 +57,18 @@
   background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' version='1.1' width='32' height='24' viewBox='0 0 32 24'><polygon points='0,0 32,0 16,24' style='fill: #b8c1c1'></polygon></svg>");
 }
 
-//Offset allows to subtract a custom padding/margin offset
+
 @mixin calcColumn-4 ($offset: 0) {
   min-width: calc(100% * (1/4) - #{$offset});
 }
 
 
-@mixin calcColumn-3 ($offset: 0){
-  min-width: calc(100% * (1/3) - #{$offset});
+@mixin calcColumn-3 {
+  min-width: calc(100% * (1/3) - 5px);
 }
 
-@mixin calcSplitColumn ($offset: 0) {
-  min-width: calc(100% * (1/2) - #{$offset});
+@mixin calcSplitColumn {
+  min-width: calc(100% * (1/2) - 5px);
 }