moving theme override variable file to right after default variable file

lms/static/sass/application.scss.mako

@@ -4,6 +4,20 @@
 @import 'base/font_face';
 @import 'base/mixins';
 @import 'base/variables';
+
+## THEMING
+## -------
+## Set up this file to import an edX theme library if the environment
+## indicates that a theme should be used. The assumption is that the
+## theme resides outside of this main edX repository, in a directory
+## called themes/<theme-name>/, with its base Sass file in
+## themes/<theme-name>/static/sass/_<theme-name>.scss. That one entry
+## point can be used to @import in as many other things as needed.
+% if env.get('THEME_NAME') is not None:
+  // import theme's Sass overrides
+  @import '${env.get('THEME_NAME')}';
+% endif
+
 @import 'base/base';
 @import 'base/extends';
 @import 'base/animations';
@@ -35,17 +49,4 @@
 @import 'discussion';
 @import 'news';
 
-@import 'shame';
-
-## THEMING
-## -------
-## Set up this file to import an edX theme library if the environment
-## indicates that a theme should be used. The assumption is that the
-## theme resides outside of this main edX repository, in a directory
-## called themes/<theme-name>/, with its base Sass file in
-## themes/<theme-name>/static/sass/_<theme-name>.scss. That one entry
-## point can be used to @import in as many other things as needed.
-% if env.get('THEME_NAME') is not None:
-  // import theme's Sass overrides
-  @import '${env.get('THEME_NAME')}'
-% endif
+@import 'shame';
\ No newline at end of file