Merge pull request #2865 from chntllh/Battery-animations

Using steps() in animation to reduce cpu usage.

resources/style.css

@@ -128,12 +128,13 @@ button:hover {
     }
 }
 
+/* Using steps() instead of linear as a timing function to limit cpu usage */
 #battery.critical:not(.charging) {
     background-color: #f53c3c;
     color: #ffffff;
     animation-name: blink;
     animation-duration: 0.5s;
-    animation-timing-function: linear;
+    animation-timing-function: steps(12);
     animation-iteration-count: infinite;
     animation-direction: alternate;
 }