Migrated widget module from Java to Kotlin (commons-app#5940)

* Rename .java to .kt

* Migrated widget module to Kotlin

Author: Saifuddin53

app/src/main/java/fr/free/nrw/commons/di/CommonsApplicationComponent.java

@@ -2,7 +2,6 @@
 
 import com.google.gson.Gson;
 
-import fr.free.nrw.commons.actions.PageEditClient;
 import fr.free.nrw.commons.explore.categories.CategoriesModule;
 import fr.free.nrw.commons.navtab.MoreBottomSheetFragment;
 import fr.free.nrw.commons.navtab.MoreBottomSheetLoggedOutFragment;

app/src/main/java/fr/free/nrw/commons/widget/HeightLimitedRecyclerView.java

@@ -0,0 +1,43 @@
+package fr.free.nrw.commons.widget
+
+import android.app.Activity
+import android.content.Context
+import android.util.AttributeSet
+import android.util.DisplayMetrics
+
+import androidx.annotation.Nullable
+import androidx.recyclerview.widget.RecyclerView
+
+
+/**
+ * Created by Ilgaz Er on 8/7/2018.
+ */
+class HeightLimitedRecyclerView : RecyclerView {
+    private var height: Int = 0
+
+    constructor(context: Context) : super(context) {
+        initializeHeight(context)
+    }
+
+    constructor(context: Context, attrs: AttributeSet?) : super(context, attrs) {
+        initializeHeight(context)
+    }
+
+    constructor(context: Context, attrs: AttributeSet?, defStyle: Int) : super(context, attrs, defStyle) {
+        initializeHeight(context)
+    }
+
+    private fun initializeHeight(context: Context) {
+        val displayMetrics = DisplayMetrics()
+        (context as Activity).windowManager.defaultDisplay.getMetrics(displayMetrics)
+        height = displayMetrics.heightPixels
+    }
+
+    override fun onMeasure(widthSpec: Int, heightSpec: Int) {
+        val limitedHeightSpec = MeasureSpec.makeMeasureSpec(
+            (height * 0.3).toInt(),
+            MeasureSpec.AT_MOST
+        )
+        super.onMeasure(widthSpec, limitedHeightSpec)
+    }
+}