Persistence doc: move Icedove preset up to the place where it is in the assistant.

Refs: #10832

wiki/src/doc/first_steps/persistence/configure.mdwn

@@ -174,6 +174,18 @@ select the <span class="guilabel">Read-Only</span> check box as a startup option
 
 </div>
 
+<a id="icedove"></a>
+
+<div class="icon">
+[[!img icedove.png link=no]]
+<div class="text"><h2>Icedove</h2></div>
+</div>
+
+When this feature is activated, the configuration and emails stored
+by the
+[[<span class="application">Icedove</span> email client|doc/anonymous_internet/icedove]]
+are saved in the persistent volume.
+
 <a id="gnome_keyring"></a>
 
 <div class="icon">
@@ -283,18 +295,6 @@ The <span class="emphasis">APT lists</span> are needed to
 or explore the list of available software packages. This feature
 allows you to reuse them during future working sessions, even offline.
 
-<a id="icedove"></a>
-
-<div class="icon">
-[[!img icedove.png link=no]]
-<div class="text"><h2>Icedove</h2></div>
-</div>
-
-When this feature is activated, the configuration and emails stored
-by the
-[[<span class="application">Icedove</span> email client|doc/anonymous_internet/icedove]]
-are saved in the persistent volume.
-
 <a id="dotfiles"></a>
 
 <div class="icon">