optimize layout

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

src/main/res/layout/passcodelock.xml

@@ -34,16 +34,15 @@
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:orientation="vertical">
+            android:orientation="vertical"
+            android:paddingStart="@dimen/standard_padding"
+            android:paddingTop="@dimen/standard_padding"
+            android:paddingEnd="@dimen/standard_padding">
 
             <LinearLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:orientation="vertical"
-                android:paddingStart="@dimen/standard_padding"
-                android:paddingTop="@dimen/standard_padding"
-                android:paddingEnd="@dimen/standard_padding"
-                android:paddingBottom="@dimen/zero">
+                android:orientation="vertical">
 
                 <TextView
                     android:id="@+id/header"