Add icons to explain 'file container' and 'partition' (#15670)

wiki/src/doc/encryption_and_privacy/veracrypt.mdwn

@@ -44,12 +44,26 @@ Difference between file containers and partitions
 With <span class="application">VeraCrypt</span> you can store your files
 encrypted in two different kinds of *volumes*:
 
-- *File containers*. A file container is a single big file inside which you can
-  store several files encrypted, a bit like a ZIP file.
-
-- *Partitions (or entire disk)*. Usually USB sticks and hard disks have a single
-  partition of their entire size but they can also be split into several
-  partitions. This way you can encrypted a whole USB stick for example.
+<h3>File containers</h3>
+
+<div class="icon">
+[[!img container-icon.png link="no"]]
+<div class="text">
+<p>A file container is a single big file inside which you can store
+several files encrypted, a bit like a ZIP file.</p>
+</div>
+</div>
+
+<h3>Partitions (or entire disks)</h3>
+
+<div class="icon">
+[[!img partition-icon.png link="no"]]
+<div class="text">
+<p>Usually USB sticks and hard disks have a single partition of their
+entire size but they can also be split into several partitions. This way
+you can encrypted a whole USB stick for example.</p>
+</div>
+</div>
 
 <a id="parameters"></a>
 
@@ -84,6 +98,8 @@ volume was created:
 Using a file container
 ======================
 
+[[!img container-icon.png link="no" alt=""]]
+
 <a id="container-files"></a>
 
 Unlocking a file container without keyfiles
@@ -201,6 +217,8 @@ Closing a file container
 Using a partition (or entire disk)
 ==================================
 
+[[!img partition-icon.png link="no" alt=""]]
+
 <a id="partition-files"></a>
 
 Unlocking a partition (or entire disk) without keyfiles