Change snackbar to fix issue where lingering timeouts would effect new activations

components/snackbar/Snackbar.jsx

@@ -18,11 +18,24 @@ class Snackbar extends React.Component {
     type: React.PropTypes.string
   };
 
-  componentDidUpdate () {
-    if (this.props.active && this.props.timeout) {
-      setTimeout(() => {
-        this.props.onTimeout();
-      }, this.props.timeout);
+  state = {
+    curTimeout: null
+  };
+
+  componentWillReceiveProps (nextProps) {
+    if (nextProps.active && nextProps.timeout) {
+      if(this.state.curTimeout) clearTimeout(this.state.curTimeout);
+
+      let curTimeout = setTimeout(() => {
+        nextProps.onTimeout();
+        this.setState({
+          curTimeout: null
+        });
+      }, nextProps.timeout);
+
+      this.setState({
+        curTimeout
+      });
     }
   }