src/*: Fix codespell issues

See,
$ codespell -S './src/img/*.png,./.git*' -L que

Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>

src/datasource-zabbix/add-metric-function.directive.js

@@ -66,7 +66,7 @@ angular
         });
 
         $input.blur(function() {
-          // clicking the function dropdown menu wont
+          // clicking the function dropdown menu won't
           // work if you remove class at once
           setTimeout(function() {
             $input.val('');