cleanup, make the save button ready for future layout

tabs/initial_setup.css

@@ -309,13 +309,15 @@
 
             margin-left: 100px;
         }
+.tab-initial_setup .buttons {
+    width: calc(100% - 20px);
+
+    position: absolute;
+    bottom: 10px;
+}
     .tab-initial_setup .update {
         display: block;
-        position: absolute;
-        bottom: 11px;
-        right: 11px;
-
-        margin: 0 3px 0 0;
+        float: right;
 
         width: 80px;
         height: 28px;

tabs/initial_setup.html

@@ -38,7 +38,7 @@
             </div>
         </div>
     </div>
-    <div class="left" style="width: 515px">
+    <div class="left">
         <div class="throttle">
             <span class="head" i18n="initialSetupThrottleHead"></span>
             <div class="fields">
@@ -69,7 +69,6 @@
                 </dl>
             </div>
         </div>
-        <a class="update" href="#" i18n="initialSetupButtonSave"></a>
         <div class="clear-both"></div>
         <div class="magnetometer">
             <span class="head" i18n="initialSetupMagHead"></span>
@@ -92,4 +91,7 @@
         </div>
         <div class="clear-both"></div>
     </div>
+    <div class="buttons">
+        <a class="update" href="#" i18n="initialSetupButtonSave"></a>
+    </div>
 </div>