ui: fix new account button padding

Tuleap: #124
Change-Id: I4ac20887bfb70c44a1cb267884685725bedf2f66
diff --git a/ring-android/app/src/main/res/layout/activity_home.xml b/ring-android/app/src/main/res/layout/activity_home.xml
index 23bbdbb..a70b7e8 100644
--- a/ring-android/app/src/main/res/layout/activity_home.xml
+++ b/ring-android/app/src/main/res/layout/activity_home.xml
@@ -68,15 +68,15 @@
             android:layout_alignParentLeft="true"
             android:layout_alignParentStart="true"
             android:layout_marginBottom="@dimen/action_button_bpadding"
-            android:layout_marginLeft="16dp"
-            android:layout_marginStart="16dp"
+            android:layout_marginLeft="@dimen/action_button_lpadding"
             android:adjustViewBounds="false"
             android:baselineAlignBottom="false"
-            android:visibility="gone"
             app:elevation="6dp"
             app:fabSize="mini"
             app:pressedTranslationZ="12dp"
-            app:rippleColor="@android:color/white"/>
+            app:rippleColor="@android:color/white"
+            android:layout_marginStart="@dimen/action_button_bpadding"
+            android:visibility="gone" />
 
     </RelativeLayout>