Add combobox reseting.

Author: kevzlou7979

src/main/java/gwt/material/design/incubator/client/daterange/DateRangePicker.java

@@ -779,6 +779,15 @@ public void setType(DateRangeType type) {
         dateInput.setReadOnly(type == DateRangeType.LABEL);
     }
 
+    @Override
+    public void reset() {
+        super.reset();
+
+        setAutoUpdateInput(false);
+        getDateInput().clear();
+        reload();
+    }
+
     @Override
     public boolean isNativeBrowserStyle() {
         return getNativeBrowserStyleMixin().isNativeBrowserStyle();