Disable Add Above when Add Mode is other than Modal

We need to figure out why the existing test breaks and add test coverage for the extra mode where this is now supposed to work.

Here is the patch that fixes the form validation issue and page refresh issue. I also added a check for the number of buttons, I guess we want to trigger the click to add above only if there is only one button/paragraph that can be added? We're still left with the original issue I see, that the Add above button is still visible for multiple dropdown buttons and it doesn't work atm - shouldn't it be hidden?

> Add above button is still visible for multiple dropdown buttons and it doesn't work atm - shouldn't it be hidden?

Correct, we only support the case with one button atm, so we need to check for that.

Added the check for the number of buttons to the paragraphsAddAboveButton() function now. Should work as expected.

1. +++ b/js/paragraphs.add_above_button.js
   @@ -13,19 +13,25 @@
   +    var $add_more_wrapper = $button.closest('table').siblings('.clearfix').find('.paragraphs-add-wrapper');
   

   Can we add a more specific class to the buttons in the code where they get added (clearfix)? Reading this line is not very obvious what we are looking for. Also not very happy with the closest selector (table), but works in this case.

2. +++ b/js/paragraphs.add_above_button.js
   @@ -38,12 +44,26 @@
   +          var $add_avobe = false;
   ...
   +            $add_avobe = true;
   ...
   +          if ($add_avobe) {
   

   Typos. :)

3. +++ b/js/paragraphs.add_above_button.js
   @@ -38,12 +44,26 @@
   +          if ($add_more_wrapper.find('.paragraph-type-add-delta').hasClass('modal')) {
   ...
   +          else if ($add_more_wrapper.find('.field-add-more-submit').length === 1) {
   

   These two cases can be merged with a OR selector.

Tested again locally with the latest patch. Seems to work fine now.

Maybe another code review from @Berdir before merging?

Thanks, committed.