Add id to be able to write custom CSS for router scenarios

wiki/src/install/debian.html

@@ -10,7 +10,7 @@
 
 <h1 class="text-center"><strong>Ubuntu</strong></h1>
 
-<div class="row">
+<div id="scenarios" class="row">
   <div class="col-md-6">
 
     [[!inline pages="install/inc/router/clone" raw="yes"]]

wiki/src/install/linux.html

@@ -10,7 +10,7 @@
 
 <h1 class="text-center"><strong>Other Linux</strong> <small>(Red Hat, Fedora, etc.)</small></h1>
 
-<div class="row">
+<div id="scenarios" class="row">
   <div class="col-md-6">
 
     [[!inline pages="install/inc/router/clone" raw="yes"]]

wiki/src/install/win.html

@@ -10,7 +10,7 @@
 
 <h1 class="text-center"><strong>Windows</strong></h1>
 
-<div class="row">
+<div id="scenarios" class="row">
   <div class="col-md-6">
 
     [[!inline pages="install/inc/router/clone" raw="yes"]]

wiki/src/upgrade.html

@@ -7,7 +7,7 @@
 
 <h1 class="text-center">Choose your <strong>manual upgrade</strong> scenario</h1>
 
-<div class="row">
+<div id="scenarios" class="row">
   <div class="col-md-6">
 
     <h3>Upgrade from another Tails</h3>