Small layout improvement

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

@@ -32,7 +32,9 @@
                 android:id="@+id/ibHintActions"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:background="?android:attr/selectableItemBackgroundBorderless"
                 android:contentDescription="@string/title_legend_close_hint"
+                android:padding="9dp"
                 app:layout_constraintBottom_toBottomOf="@id/tvHintActions"
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintTop_toTopOf="@id/tvHintActions"
@@ -64,7 +66,9 @@
                 android:id="@+id/ibHintSync"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:background="?android:attr/selectableItemBackgroundBorderless"
                 android:contentDescription="@string/title_legend_close_hint"
+                android:padding="9dp"
                 app:layout_constraintBottom_toBottomOf="@id/tvHintSync"
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintTop_toTopOf="@id/tvHintSync"

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

@@ -53,7 +53,9 @@
                 android:id="@+id/ibHintSupport"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:background="?android:attr/selectableItemBackgroundBorderless"
                 android:contentDescription="@string/title_legend_close_hint"
+                android:padding="9dp"
                 app:layout_constraintBottom_toBottomOf="@id/tvHintSupport"
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintTop_toTopOf="@id/tvHintSupport"
@@ -84,7 +86,9 @@
                 android:id="@+id/ibHintSwipe"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:background="?android:attr/selectableItemBackgroundBorderless"
                 android:contentDescription="@string/title_legend_close_hint"
+                android:padding="9dp"
                 app:layout_constraintBottom_toBottomOf="@id/tvHintSwipe"
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintTop_toTopOf="@id/tvHintSwipe"
@@ -115,7 +119,9 @@
                 android:id="@+id/ibHintSelect"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
+                android:background="?android:attr/selectableItemBackgroundBorderless"
                 android:contentDescription="@string/title_legend_close_hint"
+                android:padding="9dp"
                 app:layout_constraintBottom_toBottomOf="@id/tvHintSelect"
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintTop_toTopOf="@id/tvHintSelect"