Whitelist additional elements and attributes

Bootstrap 4.3.1 introduced sanitation for HTML popovers / tooltips. The
rules are rather strict, so we extend the default whitelists with safe
attributes / tags.

app/assets/javascripts/commons/bootstrap.js

@@ -16,3 +16,63 @@ $.fn.extend({
       .removeClass('disabled');
   },
 });
+
+/*
+ Starting with bootstrap 4.3.1, bootstrap sanitizes html used for tooltips / popovers.
+ This extends the default whitelists with more elements / attributes:
+ https://getbootstrap.com/docs/4.3/getting-started/javascript/#sanitizer
+ */
+const whitelist = $.fn.tooltip.Constructor.Default.whiteList;
+
+const inputAttributes = ['value', 'type'];
+
+const dataAttributes = [
+  'data-toggle',
+  'data-placement',
+  'data-container',
+  'data-title',
+  'data-class',
+  'data-clipboard-text',
+  'data-placement',
+];
+
+// Whitelisting data attributes
+whitelist['*'] = [
+  ...whitelist['*'],
+  ...dataAttributes,
+  'title',
+  'width height',
+  'abbr',
+  'datetime',
+  'name',
+  'width',
+  'height',
+];
+
+// Whitelist missing elements:
+whitelist.label = ['for'];
+whitelist.button = [...inputAttributes];
+whitelist.input = [...inputAttributes];
+
+whitelist.tt = [];
+whitelist.samp = [];
+whitelist.kbd = [];
+whitelist.var = [];
+whitelist.dfn = [];
+whitelist.cite = [];
+whitelist.big = [];
+whitelist.address = [];
+whitelist.dl = [];
+whitelist.dt = [];
+whitelist.dd = [];
+whitelist.abbr = [];
+whitelist.acronym = [];
+whitelist.blockquote = [];
+whitelist.del = [];
+whitelist.ins = [];
+whitelist['gl-emoji'] = [];
+
+// Whitelisting SVG tags and attributes
+whitelist.svg = ['viewBox'];
+whitelist.use = ['xlink:href'];
+whitelist.path = ['d'];