feat(picker): full width single column picker scrolling

Author: nolimits4web

src/core/components/picker/picker.less

@@ -78,6 +78,9 @@
   position: relative;
   max-height: 100%;
   z-index: 10;
+  &.picker-column-first.picker-column-last {
+    width: 100%;
+  }
 
   &.picker-column-left {
     text-align: left;