feat(thresholds): updated design for grab handles

public/app/plugins/panel/graph/thresholds.ts

@@ -19,13 +19,14 @@ export class ThresholdControls {
       colorClass = 'warn';
     }
 
-    return `<div class="alert-handle-wrapper alert-handle-wrapper--T${handleIndex}">
-    <div class="alert-handle-line alert-handle-line--${colorClass}">
-    </div>
-    <div class="alert-handle" data-handle-index="${handleIndex}">
-    <i class="icon-gf icon-gf-${colorClass} alert-icon-${colorClass}"></i>
-    <span class="alert-handle-value">${valueStr}</span>
-    </div>
+    return `
+    <div class="alert-handle-wrapper alert-handle-wrapper--T${handleIndex}">
+      <div class="alert-handle-line alert-handle-line--${colorClass}">
+      </div>
+      <div class="alert-handle" data-handle-index="${handleIndex}">
+        <i class="icon-gf icon-gf-${colorClass} alert-icon-${colorClass}"></i>
+        <span class="alert-handle-value">${valueStr}<i class="alert-handle-grip"></i></span>
+      </div>
     </div>`;
 
   }

public/img/grab_dark.svg

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generated by IcoMoon.io -->
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="12" height="32" viewBox="0 0 12 32">
+<g id="icomoon-ignore">
+</g>
+<path d="M0 2h4v4h-4v-4z" fill="#414141"></path>
+<path d="M0 10h4v4h-4v-4z" fill="#414141"></path>
+<path d="M0 18h4v4h-4v-4z" fill="#414141"></path>
+<path d="M0 26h4v4h-4v-4z" fill="#414141"></path>
+<path d="M8 2h4v4h-4v-4z" fill="#414141"></path>
+<path d="M8 10h4v4h-4v-4z" fill="#414141"></path>
+<path d="M8 18h4v4h-4v-4z" fill="#414141"></path>
+<path d="M8 26h4v4h-4v-4z" fill="#414141"></path>
+</svg>

public/img/grab_light.svg

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generated by IcoMoon.io -->
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="12" height="32" viewBox="0 0 12 32">
+<g id="icomoon-ignore">
+</g>
+<path d="M0 2h4v4h-4v-4z" fill="#CCC"></path>
+<path d="M0 10h4v4h-4v-4z" fill="#CCC"></path>
+<path d="M0 18h4v4h-4v-4z" fill="#CCC"></path>
+<path d="M0 26h4v4h-4v-4z" fill="#CCC"></path>
+<path d="M8 2h4v4h-4v-4z" fill="#CCC"></path>
+<path d="M8 10h4v4h-4v-4z" fill="#CCC"></path>
+<path d="M8 18h4v4h-4v-4z" fill="#CCC"></path>
+<path d="M8 26h4v4h-4v-4z" fill="#CCC"></path>
+</svg>

public/sass/_variables.dark.scss

@@ -152,8 +152,10 @@ $btn-link-color:              $gray-3;
 
 $iconContainerBackground:	    $black;
 
-$btn-divider-left:   $dark-5;
-$btn-divider-right:  $dark-1;
+$btn-divider-left:   $dark-4;
+$btn-divider-right:  $dark-2;
+
+$btn-drag-image: '../img/grab_dark.svg';
 
 // Forms
 // -------------------------

public/sass/_variables.light.scss

@@ -157,8 +157,9 @@ $btn-inverse-text-color:  $dark-4;
 
 $btn-link-color: $gray-1;
 
-$btn-divider-left:   $dark-5;
-$btn-divider-right:  $dark-1;
+$btn-divider-left:   $gray-4;
+$btn-divider-right:  $gray-7;
+$btn-drag-image:    '../img/grab_light.svg';
 
 $iconContainerBackground: $white;
 

public/sass/components/_panel_graph.scss

@@ -350,6 +350,15 @@
     border-left: 1px solid $btn-divider-right;
     padding: 0.5rem;
     line-height: 2rem;
+
+    .alert-handle-grip {
+      background: url($btn-drag-image) no-repeat 50% 50%;
+      background-size: 8px;
+      float: right;
+      width: 1rem;
+      height: 2rem;
+      margin-right: 2px;
+    }
   }
 
   &--T1 {