ux(): minor tweak

public/sass/components/_sidemenu.scss

@@ -218,7 +218,7 @@
 }
 
 .sidemenu-org-avatar--missing {
-  color: $text-color;
+  color: $gray-4;
   text-shadow: 0 1px 0 $dark-1;
   line-height: 40px;
   font-size: $font-size-lg;

public/sass/mixins/_mixins.scss

@@ -332,15 +332,14 @@
 }
 
 @mixin left-brand-border() {
-  border-left: 1px solid transparent;
+  border-left: 2px solid transparent;
 }
 
 @mixin left-brand-border-gradient() {
-  border-left: 1px solid transparent;
   border-image: linear-gradient(rgba(255,213,0,1) 0%, rgba(255,68,0,1) 99%, rgba(255,68,0,1) 100%);
   border-image-slice: 1;
   border-top: 0;
   border-right: 0;
   border-bottom: 0;
-  border-left: 1px solid transparent;
+  border-left: 2px solid transparent;
 }