fixed minor misstake with dashboard padding

packages/grafana-ui/src/themes/_variables.scss.tmpl.ts

@@ -212,7 +212,7 @@ $btn-semi-transparent: rgba(0, 0, 0, 0.2) !default;
 $side-menu-width: 60px;
 
 // dashboard
-$dashboard-padding: 20 * 2;
+$dashboard-padding: 10px * 2;
 $panel-horizontal-padding: 10;
 $panel-vertical-padding: 5;
 $panel-padding: 0px $panel-horizontal-padding + 0px $panel-vertical-padding + 0px $panel-horizontal-padding + 0px;

public/sass/_variables.generated.scss

@@ -215,7 +215,7 @@ $btn-semi-transparent: rgba(0, 0, 0, 0.2) !default;
 $side-menu-width: 60px;
 
 // dashboard
-$dashboard-padding: 20 * 2;
+$dashboard-padding: 10px * 2;
 $panel-horizontal-padding: 10;
 $panel-vertical-padding: 5;
 $panel-padding: 0px $panel-horizontal-padding + 0px $panel-vertical-padding + 0px $panel-horizontal-padding + 0px;