bitbake: toaster: customrecipejs Consume click event on 'a' link if disabled

Consume the click event on the download recipe link if it's disabled. To
prevent the link from sending user to an error page.
See http://getbootstrap.com/css/#forms-disabled-fieldsets and a link
caveat.

[YOCTO #10151]

(Bitbake rev: bc8401e78cea140349bded228d38f72f628b3980)

Signed-off-by: Michael Wood <michael.g.wood@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/toastergui/static/js/customrecipe.js

@@ -312,5 +312,11 @@ function customRecipePageInit(ctx) {
     });
   });
 
+ /* Stop the download link from working if it is in disabled state
+  * http://getbootstrap.com/css/#forms-disabled-fieldsets
+  */
+ $("a[disabled=disabled]").click(function(e){
+   e.preventDefault();
+ });
 
 }