Bug 24764: TinyMCE shouldnt do automatic code cleanup when editing HTML in News Feature

TEST PLAN:
1. Make a new news item and use the TinyMCE editor, click on the <> icon to go to the Source code editor
2. Add some HTML like <i class="fa fa-facebook-official" aria-hidden="true">TEST</i> and save it.
3. Go back in and notice that TinyMCE has changed it to: <p><em class="fa fa-facebook-official">TEST</em></p>
4. It should not auto clean up and also it should not autowrap with <p> tag.
5. Apply patch patch, and repeat step 2. Save again.
6. It should not have automatiicly changed any HTML or added any <p> wrapper.

Signed-off-by: David Cook <dcook@prosentient.com.au>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

Signed-off-by: Joy Nelson <joy@bywatersolutions.com>

koha-tmpl/intranet-tmpl/prog/en/modules/tools/koha-news.tt

@@ -296,6 +296,10 @@ Edit news item[% ELSE %]Add news item[% END %][% ELSE %]News[% END %]</div>
     [% INCLUDE 'str/tinymce_i18n.inc' %]
     <script>
         tinyMCE.init({
+            verify_html: false,
+            force_br_newlines : false,
+            force_p_newlines : false,
+            forced_root_block : '',
             branding : false,
             content_css : "[% interface | html %]/[% theme | html %]/css/tinymce.css",
             menubar : "file edit view insert format tools table",