Bug 25862: Prevent TinyMCE to mangle local url links

To test:
1 create a report 1 if it doesn't exist
2 open /cgi-bin/koha/tools/koha-news.pl
3 create a news
4 add a HTML link with Insert/Edit link tinyMCE dialog box to
  /cgi-bin/koha/reports/guided_reports.pl?reports=1&phase=Run%20this%20report "report 1"
5 save
6 on the main page "report 1" link returns a 404 error

Apply patch
7 Modify news' URL
8 Test it works in: tools/koha-new.pl admin/branches.pl and admin/preferences.pl

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>

koha-tmpl/intranet-tmpl/prog/en/includes/wysiwyg-systempreferences.inc

@@ -14,6 +14,7 @@
 
     tinyMCE.init({
         branding : false,
+        relative_urls : false,
         content_css : "[% interface | html %]/[% theme | html %]/css/tinymce.css",
         editor_selector : "mce",
         menubar : "file edit view insert format tools table",

koha-tmpl/intranet-tmpl/prog/en/modules/admin/branches.tt

@@ -387,6 +387,7 @@
 
         tinyMCE.init({
             branding : false,
+            relative_urls : false,
             content_css : "[% interface | html %]/[% theme | html %]/css/tinymce.css",
             menubar : "file edit view insert format tools table",
             mode : "specific_textareas",

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

@@ -301,6 +301,7 @@ Edit news item[% ELSE %]Add news item[% END %][% ELSE %]News[% END %]</div>
             force_p_newlines : false,
             forced_root_block : '',
             branding : false,
+            relative_urls : false,
             content_css : "[% interface | html %]/[% theme | html %]/css/tinymce.css",
             menubar : "file edit view insert format tools table",
             mode : "specific_textareas",