ux: minor tweak to faintness of icons of panel menu caret

public/sass/components/_row.scss

@@ -167,7 +167,7 @@ $dash-row-menu-animation-speed: 0.20s;
 .dash-row-menu-grip {
   text-align: center;
   font-size: 130%;
-  color: $text-color-faint;
+  color: $text-color-weak;
   opacity: 1;
   transition: $dash-row-menu-animation-speed ease-out 0.5s;
   width: 1rem;

public/sass/pages/_dashboard.scss

@@ -74,7 +74,7 @@ div.flot-text {
 }
 
 .panel-menu-toggle {
-  color: $text-color-faint;
+  color: $text-color-weak;
   cursor: pointer;
   padding: 3px 5px;
 }