Background sheet is set to refreshLayout instead of LinearLayout

app/src/main/java/com/paktalin/vocabularynotebook/ui/activities/MainActivity.kt

@@ -79,7 +79,7 @@ class MainActivity : AppCompatActivity() {
         vocabularyFragment = VocabularyFragment()
         val arguments = Bundle()
         arguments.putString("vocabularyId", vocabularyId)
-        addFragment(supportFragmentManager, vocabularyFragment, R.id.container_vocabulary, arguments)
+        addFragment(supportFragmentManager, vocabularyFragment, R.id.scrollView, arguments)
     }
 
     private fun hideKeyboard() {

app/src/main/res/layout/content_main.xml

@@ -40,28 +40,23 @@
         android:layout_marginLeft="@dimen/small_margin"
         android:layout_marginRight="@dimen/small_margin"
         android:layout_marginStart="@dimen/small_margin"
+        android:layout_marginBottom="@dimen/small_margin"
         app:layout_constraintBottom_toTopOf="@+id/btnSubmitLayout"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/container_main">
+        app:layout_constraintTop_toBottomOf="@+id/container_main"
+        android:background="@drawable/sheet_bottom">
 
         <com.paktalin.vocabularynotebook.ui.views.LockableScrollView
             android:id="@+id/scrollView"
             android:layout_width="match_parent"
             android:layout_height="0dp"
-            android:scrollbars="vertical">
-
-            <LinearLayout
-                android:id="@+id/container_vocabulary"
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:background="@drawable/sheet_bottom"
-                android:orientation="vertical"
-                android:paddingBottom="@dimen/small_padding"
-                android:paddingEnd="@dimen/small_padding"
-                android:paddingLeft="@dimen/small_padding"
-                android:paddingRight="@dimen/small_padding"
-                android:paddingStart="@dimen/small_padding" />
+            android:scrollbars="vertical"
+            android:paddingBottom="@dimen/small_padding"
+            android:paddingEnd="@dimen/small_padding"
+            android:paddingLeft="@dimen/small_padding"
+            android:paddingRight="@dimen/small_padding"
+            android:paddingStart="@dimen/small_padding">
         </com.paktalin.vocabularynotebook.ui.views.LockableScrollView>
     </android.support.v4.widget.SwipeRefreshLayout>