Improve notice when no snippets are avaiable

Author: abias

lang/en/theme_boost_union.php

@@ -1120,7 +1120,7 @@
 $string['snippetsgoaldevsonly'] = 'For developers only';
 $string['snippetsgoaleaseofuse'] = 'Ease of use';
 $string['snippetsgoaleyecandy'] = 'Eye candy';
-$string['snippetsnothingtodisplay'] = 'There aren\'t any SCSS snippets which can be used.';
+$string['snippetsnothingtodisplay'] = 'There aren\'t any SCSS snippets which can be used. Please go to the settings tab and enable the built-in SCSS snippets or upload your own SCSS snippets.';
 $string['snippetsoverview'] = 'Overview';
 $string['snippetsoverview_desc'] = '<p>Boost Union\'s SCSS snippets offer a possibility to add small (or slightly larger) amounts of SCSS to the Moodle site. This can be particularly handy for fixing small visual glitches in Moodle core or for adding eye candy to your Moodle site.</p>Please note that the SCSS snippets are added to the SCSS stack one after another. Thus, the order of the snippets on this page is key.</p><p>Please note as well that after each change which you make on this page, the theme cache is purged. This is necessary to make sure that the compiled SCSS code which is shipped to the browser is up-to-date.</p>';
 $string['snippetsscope'] = 'Scope';