use a better scaling type for widget previews

app/src/main/kotlin/com/simplemobiletools/launcher/adapters/WidgetsAdapter.kt

@@ -84,7 +84,6 @@ class WidgetsAdapter(
 
             Glide.with(activity)
                 .load(widget.widgetPreviewImage)
-                .fitCenter()
                 .into(widgetPreview)
 
             widgetPreview.setOnClickListener {

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

@@ -5,6 +5,7 @@
     android:layout_width="@dimen/widget_preview_size"
     android:layout_height="@dimen/widget_preview_size"
     android:layout_gravity="center"
+    android:scaleType="centerInside"
     android:adjustViewBounds="true"
     android:background="@drawable/widget_preview_background"
     android:padding="@dimen/normal_margin"