Fast scroll issue fixed (commons-app#3593)

* fast scroll fixed in explore activity

* fast scroll fixed in explore activity

* fast scroll issue in explore

* fastscroll removed from explore

Author: 318anushka

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

@@ -2,31 +2,40 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/parentLayout"
+    android:orientation="vertical"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:background="?attr/mainBackground">
 
     <TextView
-        android:id="@+id/statusMessage"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_centerHorizontal="true"
-        android:layout_centerVertical="true"
-        android:layout_gravity="center"
         android:text="@string/waiting_first_sync"
+        android:id="@+id/statusMessage"
+        android:layout_gravity="center"
         android:visibility="gone"
-        tools:visibility="visible" />
+        tools:visibility="visible"
+        android:layout_centerHorizontal="true"
+        android:layout_centerVertical="true"
+        />
 
     <ProgressBar
-        android:id="@+id/loadingImagesProgressBar"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_centerInParent="true"
-        android:visibility="gone" />
+        android:visibility="gone"
+        android:id="@+id/loadingImagesProgressBar"
+        />
 
-    <androidx.recyclerview.widget.RecyclerView
-        android:id="@+id/listView"
-        android:layout_width="match_parent"
+    <GridView
+        android:id="@+id/categoryImagesList"
         android:layout_height="match_parent"
+        android:layout_width="match_parent"
+        android:stretchMode="columnWidth"
+        android:columnWidth="@dimen/very_large_height"
+        android:numColumns="auto_fit"
+        android:listSelector="@null"
+        android:fadingEdge="none"
         />
 
 </RelativeLayout>