added messages list, new client form, logic for client Apps plus others

public/libs/select2/docs/_includes/options-old/events.html

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+<section>
+  <div id="events" class="page-header">
+    <h1>Events</h1>
+  </div>
+
+  <p>
+    Select2 has an internal event system that is used to notify parts of the
+    component that state has changed, as well as an adapter that allows some
+    of these events to be relayed to the outside word.
+  </p>
+
+  <dl class="dl-horizontal">
+    <dt>Adapter</dt>
+    <dd>
+      <code title="select2/selection">SelectionAdapter</code>
+    </dd>
+
+    <dt>Decorator</dt>
+    <dd>
+      <code title="select2/selection/eventRelay">EventRelay</code>
+    </dd>
+  </dl>
+
+  <h2 id="events-public">
+    Public events
+  </h2>
+
+  <p>
+    All public events are relayed using the jQuery event system, and they are
+    triggered on the <code>&lt;select&gt;</code> element that Select2 is
+    attached to. You can attach to them using the
+    <a href="https://api.jquery.com/on/"><code>.on</code> method</a> provided
+    by jQuery.
+  </p>
+
+  <h2 id="events-internal">
+    Internal events
+  </h2>
+
+  <p>
+    Select2 triggers internal events using its own internal event system,
+    which allows adapters to communicate with each other. These events are not
+    accessible through the jQuery event system.
+  </p>
+
+  <p>
+    You can find more information on the public events triggered by individual
+    adapters in <a href="#adapters">the individual adapter documentation</a>.
+  </p>
+</section>