Clarify transitions

Author: iveysaur

src/components/slider/slider.scss

@@ -70,7 +70,8 @@ md-slider *::after {
 }
 
 .md-slider-track-fill {
-  transition: all 400ms cubic-bezier(0.25, 0.8, 0.25, 1);
+  transition-duration: 400ms;
+  transition-timing-function: cubic-bezier(0.25, 0.8, 0.25, 1);
   transition-property: width, height;
   background-color: md-color($md-accent);
 }
@@ -80,7 +81,8 @@ md-slider *::after {
   left: 0;
   top: 50%;
   transform: translate3d(-50%, -50%, 0);
-  transition: all 400ms cubic-bezier(0.25, 0.8, 0.25, 1);
+  transition-duration: 400ms;
+  transition-timing-function: cubic-bezier(0.25, 0.8, 0.25, 1);
   transition-property: left, bottom;
 }