Merge pull request #14691 from Quy/master

Fix anchor link

docs/_jade/customizer-nav.jade

 // NOTE: DO NOT EDIT THE FOLLOWING SECTION DIRECTLY! It is autogenerated via the `build-customizer-html` Grunt task using the customizer-nav.jade template.
 li
-  a(href='#import') Import
+  a(href='#import-drop-target') Import
 li
   a(href='#less') Less components
 li